Which of the following statements correctly describes when the switch receives an ARP request packet
ARP (Address Resolution Protocol) is a network protocol used to find out the hardware (MAC) address of a device from an IP address. It is used when a device wants to communicate with some other device on a local network (for example on an Ethernet network that requires physical addresses to be known before sending packets). The sending device uses ARP to translate IP addresses to MAC addresses. The device sends an ARP request message containing the IP address of the receiving device. All devices on a local network segment see the message, but only the device that has that IP address responds with the ARP reply message containing its MAC address. The sending device now has enough information to send the packet to the receiving device. Show
ARP request packets are sent to the broadcast addresses (FF:FF:FF:FF:FF:FF for the Ethernet broadcasts and 255.255.255.255 for the IP broadcast). Here is the explanation otf the ARP process: CCNA 1 v7.0 Modules 8 – 10 Exam Answers p15-1 CCNA 1 v7.0 Modules 8 – 10 Exam Answers p15-2 Explanation: Packets with a destination of 172.17.6.15 are forwarded through Fa0/0. Packets with a destination of 172.17.10.5 are forwarded through Fa1/1. Packets with a destination of 172.17.12.10 are forwarded through Fa1/0. Packets with a destination of 172.17.14.8 are forwarded through Fa0/1. Because network 172.17.8.0 has no entry in the routing table, it will take the gateway of last resort, which means that packets with a destination of 172.17.8.20 are forwarded through Serial0/0/0. Because a gateway of last resort exists, no packets will be dropped. 16. What information does the loopback test provide?The TCP/IP stack on the device is working correctly.* 17. What routing table entry has a next hop address associated with a destination network?directly-connected routes 18. How do hosts ensure that their packets are directed to the correct network destination?They have to keep their own local routing table that contains a route to the loopback
interface, a local network route, and a remote default route.* 19. When transporting data from real-time applications, such as streaming audio and video, which field in the IPv6 header can be used to inform the routers and switches to maintain the same path for the packets in the same conversation?Next Header Explanation: The Flow Label in IPv6 header is a 20-bit field that provides a special service for real-time applications. This field can be used to inform routers and switches to maintain the same path for the packet flow so that packets will not be reordered. 20. What statement describes the function of the Address Resolution Protocol?ARP is used to discover the IP address of any host on a different network. 21. Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)The frame has the broadcast address as the destination address.* Explanation: A switch will flood a frame out of every port, except the one that the frame was received from, under two circumstances. Either the frame has the broadcast address as the destination address, or the destination address is unknown to the switch. 22. Which statement describes the treatment of ARP requests on the local link?They must be forwarded by all routers on the local network. Explanation: One of the negative issues with ARP requests is that they are sent as a broadcast. This means all devices on the local link must receive and process the request. 23. Which destination address is used in an ARP request frame?0.0.0.0 Explanation: The purpose of an ARP request is to find the MAC address of the destination host on an Ethernet LAN. The ARP process sends a Layer 2 broadcast to all devices on the Ethernet LAN. The frame contains the IP address of the destination and the broadcast MAC address, FFFF.FFFF.FFFF. The host with the IP address that matches the IP address in the ARP request will reply with a unicast frame that includes the MAC address of the host. Thus the original sending host will obtain the destination IP and MAC address pair to continue the encapsulation process for data transmission. 24. A network technician issues the arp -d * command on a PC after the router that is connected to the LAN is reconfigured. What is the result after this command is issued?The ARP cache is cleared.* Explanation: Issuing the arp –d * command on a PC will clear the ARP cache content. This is helpful when a network technician wants to ensure the cache is populated with updated information. 25. Refer to the exhibit.CCNA 1 v7.0 Modules 8 – 10 Exam Answers p25 The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?The switch will discard the frame. Explanation: The MAC address of PC3 is not present in the MAC table of the switch. Because the switch does not know where to send the frame that is addressed to PC3, it will forward the frame to all the switch ports, except for port 4, which is the incoming port. 26. Which two types of IPv6 messages are used in place of ARP for address resolution?anycast Explanation: IPv6 does not use ARP. Instead, ICMPv6 neighbor discovery is used by sending neighbor solicitation and neighbor advertisement messages. 27. What is the aim of an ARP spoofing attack?to flood the network with ARP reply broadcasts 28. Refer to the exhibit.CCNA 1 v7.0 Modules 8 – 10 Exam Answers p28 PC1 attempts to connect to File_server1 and sends an ARP request to obtain a destination MAC address. Which MAC address will PC1 receive in the ARP reply?the MAC address of S1 29. Where are IPv4 address to Layer 2 Ethernet address mappings maintained on a host computer?neighbor table 30. What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward?source MAC address Explanation: The Layer 2 device, such as a switch, uses the destination MAC address to determine which path (interface or port) should be used to send the data onward to the destination device. 31. Match the commands to the correct actions. (Not all options are used.)CCNA 1 v7.0 Modules 8 – 10 Exam Answers p31 32. A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?Reboot the device. Explanation: While at the privileged mode prompt such as Router#, type exit,press Enter, and the banner message appears. Power cycling a network device that has had the banner motd command issued will also display the banner message, but this is not a quick way to test the configuration. 33. A network administrator requires access to manage routers and switches locally and remotely. Match the description to the access method. (Not all options are used.)CCNA 1 v7.0 Modules 8 – 10 Exam Answers p33 Explanation: Both the console and AUX ports can be used to directly connect to a Cisco network device for management purposes. However, it is more common to use the console port. The AUX port is more often used for remote access via a dial up connection. SSH and Telnet are both remote access methods that depend on an active network connection. SSH uses a stronger password authentication than Telnet uses and also uses encryption on transmitted data. 34. Match the phases to the functions during the boot up process of a Cisco router. (Not all options are used.)CCNA 1 v7.0 Modules 8 – 10 Exam Answers p34 Explanation: There are three major phases to the bootup process of a Cisco router: 35. Match the command with the device mode at which the command is entered. (Not all options are used.)CCNA 1 v7.0 Modules 8 – 10 Exam Answers p35 Explanation: The enable command is entered in R1> mode. The login command is entered in R1(config-line)# mode. The copy running-config startup-config command is entered in R1# mode. The ip address 192.168.4.4 255.255.255.0 command is entered in R1(config-if)# mode. The service password-encryption command is entered in global configuration mode. 36. What are two functions of NVRAM? (Choose two.)to store the routing table Explanation: NVRAM is permanent memory storage, so the startup configuration file is preserved even if the router loses power. 37. A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt. 38. The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?The switch will have a management interface with the address 172.16.100.1. Explanation: A default gateway address is typically configured on all devices to allow them to communicate beyond just their local network.In a switch this is achieved using the command ip default-gateway . 39. What happens when the transport input ssh command is entered on the switch vty lines?The SSH client on the switch is enabled. Explanation: The transport input ssh command when entered on the switch vty (virtual terminal lines) will encrypt all inbound controlled telnet connections. 40. Refer to the exhibit.CCNA 1 v7.0 Modules 8 – 10 Exam Answers p40 A user PC has successfully transmitted packets to www.cisco.com. Which IP address does the user PC target in order to forward its data off the local network?172.24.255.17 41. Match the configuration mode with the command that is available in that mode. (Not all options are used.)CCNA 1 v7.0 Modules 8 – 10 Exam Answers p41 Explanation: The enable command is entered at the R1> prompt. The login command is entered at the R1(config-line)# prompt. The copy running-config startup-config command is entered at the R1# prompt. The interface fastethernet 0/0 command is entered at the R1(config)# prompt. 42. Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three.)interface fastethernet 0/0 Explanation: The three commands needed to password protect the console port are as follows: 43. Refer to the exhibit.CCNA 1 v7.0 Modules 8 – 10 Exam Answers p43 Consider the IP address configuration shown from PC1. What is a description of the default gateway address?It is the IP address of the Router1 interface that connects the company to the Internet. 44. Which two functions are primary functions of a router? (Choose two.)packet forwarding* Explanation: A router accepts a packet and accesses its routing table to determine the appropriate exit interface based on the destination address. The router then forwards the packet out of that interface. 45. What is the effect of using the Router# copy running-config startup-config command on a router?The contents of ROM will change. Explanation: The command copy running-config startup-config copies the running-configuration file from RAM into NVRAM and saves it as the startup-configuration file. Since NVRAM is none-volatile memory it will be able to retain the configuration details when the router is powered off. 46. What will happen if the default gateway address is incorrectly configured on a host?The host cannot communicate with other hosts in the local network. Explanation: When a host needs to send a message to another host located on the same network, it can forward the message directly. However, when a host needs to send a message to a remote network, it must use the router, also known as the default gateway. This is because the data link frame address of the remote destination host cannot be used directly. Instead, the IP packet has to be sent to the router (default gateway) and the router will forward the packet toward its destination. Therefore, if the default gateway is incorrectly configured, the host can communicate with other hosts on the same network, but not with hosts on remote networks. 47. What are two potential network problems that can result from ARP operation? (Choose two.)Manually configuring static ARP associations could facilitate ARP poisoning or
MAC address spoofing. Explanation: Large numbers of ARP broadcast messages could cause momentary data communications delays. Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent to intercept network traffic. ARP requests and replies cause entries to be made into the ARP table, not the MAC address table. ARP table overflows are very unlikely. Manually configuring static ARP associations is a way to prevent, not facilitate, ARP poisoning and MAC address spoofing. Multiple ARP replies resulting in the switch MAC address table containing entries that match the MAC addresses of connected nodes and are associated with the relevant switch port are required for normal switch frame forwarding operations. It is not an ARP caused network problem. 48. Open the PT activity. Perform the tasks in the activity instructions and then answer the question. Which interfaces in each router are active and operational?R1: G0/0 and S0/0/0 R1: G0/1 and S0/0/1 R1: G0/0 and S0/0/0 R1: G0/0 and S0/0/1 Explanation: The command to use for this activity is show ip interface brief in each router. The active and operational interfaces are represented by the value “up” in the “Status” and “Protocol” columns. The interfaces in R1 with these characteristics are G0/0 and S0/0/0. In R2 they are G0/1 and S0/0/0. 49. Which term describes a field in the IPv4 packet header used to identify the next level protocol?Protocol* 50. Which term describes a field in the IPv4 packet header that contains an 8-bit binary value used to determine the priority of each packet?differentiated services* 51. Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?source IPv4 address* 52. Which term describes a field in the IPv4 packet header used to detect corruption in the IPv4 header?header checksum* 53.RTR1(config)# interface gi0/1 RTR1(config-if)# description Connects to the Marketing LAN RTR1(config-if)# ip address 10.27.15.17 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# interface gi0/0 RTR1(config-if)# description Connects to the Payroll LAN RTR1(config-if)# ip address 10.27.14.148 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# interface s0/0/0 RTR1(config-if)# description Connects to the ISP RTR1(config-if)# ip address 10.14.15.254 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# interface s0/0/1 RTR1(config-if)# description Connects to the Head Office WAN RTR1(config-if)# ip address 203.0.113.39 255.255.255.0 RTR1(config-if)# no shutdown RTR1(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Payroll LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?10.27.14.148* 54. Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?destination IPv4 address* 55. Which term describes a field in the IPv4 packet header used to limit the lifetime of a packet?TTL* 56. Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100?Versión* 57. Which term describes a field in the IPv4 packet header used to identify the next level protocol?Protocol* 58. Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100?Versión* 59. What property of ARP causes cached IP-to-MAC mappings to remain in memory longer?Entries in an ARP table are time-stamped and are purged after the timeout expires.* 60. What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table?A static IP-to-MAC address entry can be entered manually into an ARP table.* 61. What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table?A static IP-to-MAC address entry can be entered manually into an ARP table.* 62. What property of ARP allows hosts on a LAN to send traffic to remote networks?Local hosts learn the MAC address of the default gateway.* 63.Floor(config)# interface gi0/1 Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 192.168.235.234 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface gi0/0 Floor(config-if)# description Connects to the Manager LAN Floor(config-if)# ip address 192.168.234.114 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/0 Floor(config-if)# description Connects to the ISP Floor(config-if)# ip address 10.234.235.254 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/1 Floor(config-if)# description Connects to the Head Office WAN Floor(config-if)# ip address 203.0.113.3 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?192.168.235.234* 64. What property of ARP forces all Ethernet NICs to process an ARP request?The destination MAC address
FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.* 65. What property of ARP causes a reply only to the source sending an ARP request?The source MAC address appears in the header of the Ethernet
frame.* 66. What property of ARP causes the request to be flooded out all ports of a switch except for the port receiving the ARP request?The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of
the Ethernet frame.* 67. What property of ARP causes the NICs receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process?The type field 0x806 appears in the header of the Ethernet
frame.* 68. What property of ARP causes the NICs receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process?The type field 0x806 appears in the header of the
Ethernet frame.* 69.Main(config)# interface gi0/1 Main(config-if)# description Connects to the Service LAN Main(config-if)# ip address 172.29.157.156 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface gi0/0 Main(config-if)# description Connects to the Engineering LAN Main(config-if)# ip address 172.29.156.36 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/0 Main(config-if)# description Connects to the ISP Main(config-if)# ip address 10.156.157.254 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/1 Main(config-if)# description Connects to the Head Office WAN Main(config-if)# ip address 198.51.100.177 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Service LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?172.29.157.156* 70.BldgA(config)# interface gi0/1 BldgA(config-if)# description Connects to the Medical LAN BldgA(config-if)# ip address 192.168.191.189 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface gi0/0 BldgA(config-if)# description Connects to the Client LAN BldgA(config-if)# ip address 192.168.190.70 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/0 BldgA(config-if)# description Connects to the ISP BldgA(config-if)# ip address 10.190.191.254 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/1 BldgA(config-if)# description Connects to the Head Office WAN BldgA(config-if)# ip address 198.51.100.213 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Medical LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?192.168.191.189* 71.Floor(config)# interface gi0/1 Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 192.168.225.223 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface gi0/0 Floor(config-if)# description Connects to the Manager LAN Floor(config-if)# ip address 192.168.224.103 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/0 Floor(config-if)# description Connects to the ISP Floor(config-if)# ip address 10.224.225.254 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/1 Floor(config-if)# description Connects to the Head Office WAN Floor(config-if)# ip address 203.0.113.246 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?192.168.225.223* 72.Floor(config)# interface gi0/1 Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 10.118.63.65 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface gi0/0 Floor(config-if)# description Connects to the Manager LAN Floor(config-if)# ip address 10.118.62.196 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/0 Floor(config-if)# description Connects to the ISP Floor(config-if)# ip address 10.62.63.254 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# interface s0/0/1 Floor(config-if)# description Connects to the Head Office WAN Floor(config-if)# ip address 209.165.200.87 255.255.255.0 Floor(config-if)# no shutdown Floor(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Manager LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?10.118.62.196* 73.HQ(config)# interface gi0/1 HQ(config-if)# description Connects to the Branch LAN HQ(config-if)# ip address 172.19.99.99 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface gi0/0 HQ(config-if)# description Connects to the Store LAN HQ(config-if)# ip address 172.19.98.230 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/0 HQ(config-if)# description Connects to the ISP HQ(config-if)# ip address 10.98.99.254 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/1 HQ(config-if)# description Connects to the Head Office WAN HQ(config-if)# ip address 209.165.200.120 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Store LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?172.19.98.230* 74.HQ(config)# interface gi0/1 HQ(config-if)# description Connects to the Branch LAN HQ(config-if)# ip address 172.20.133.132 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface gi0/0 HQ(config-if)# description Connects to the Store LAN HQ(config-if)# ip address 172.20.132.13 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/0 HQ(config-if)# description Connects to the ISP HQ(config-if)# ip address 10.132.133.254 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# interface s0/0/1 HQ(config-if)# description Connects to the Head Office WAN HQ(config-if)# ip address 198.51.100.156 255.255.255.0 HQ(config-if)# no shutdown HQ(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Store LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?172.20.132.13* 75.Main(config)# interface gi0/1 Main(config-if)# description Connects to the Service LAN Main(config-if)# ip address 192.168.167.166 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface gi0/0 Main(config-if)# description Connects to the Engineering LAN Main(config-if)# ip address 192.168.166.46 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/0 Main(config-if)# description Connects to the ISP Main(config-if)# ip address 10.166.167.254 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# interface s0/0/1 Main(config-if)# description Connects to the Head Office WAN Main(config-if)# ip address 198.51.100.189 255.255.255.0 Main(config-if)# no shutdown Main(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Service LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?192.168.167.166* 76.BldgA(config)# interface gi0/1 BldgA(config-if)# description Connects to the Medical LAN BldgA(config-if)# ip address 192.168.201.200 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface gi0/0 BldgA(config-if)# description Connects to the Client LAN BldgA(config-if)# ip address 192.168.200.80 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/0 BldgA(config-if)# description Connects to the ISP BldgA(config-if)# ip address 10.200.201.254 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# interface s0/0/1 BldgA(config-if)# description Connects to the Head Office WAN BldgA(config-if)# ip address 203.0.113.222 255.255.255.0 BldgA(config-if)# no shutdown BldgA(config-if)# endRefer to the exhibit. A network administrator is connecting a new host to the Medical LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?192.168.201.200* 77. Open the PT activity. Perform the tasks in the activity instructions and then answer the question.CCNA 1 v7.0 Modules 8 – 10 Exam Answers p77 Which interfaces in each router are active and operational?R1: G0/0 and S0/0/1 R1: G0/1 and S0/0/1 R1: G0/0 and S0/0/0 R1: G0/0 and S0/0/0 CCNA1 v7 – ITN – Modules 8 – 10: Communicating Between Networks Exam Answers (Additional)1. Which information is used by routers to forward a data packet toward its destination?source IP address 2. A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?The packet will be sent to the default gateway first, and then, depending on the response from the gateway, it may be sent to the destination
host. 3. A router receives a packet from the Gigabit 0/0 interface and determines that the packet needs to be forwarded out the Gigabit 0/1 interface. What will the router do next?route the
packet out the Gigabit 0/1 interface 4. Which IPv4 address can a host use to ping the loopback interface?126.0.0.1 5. When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?Connectionless acknowledgements are used to request retransmission. 6. What was the reason for the creation and implementation of IPv6?to make reading a 32-bit address easier 7. Which statement accurately describes a characteristic of IPv4?All IPv4
addresses are assignable to hosts. 8. Which field in an IPv4 packet header will typically stay the same during its transmission?Flag 9. When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?destination MAC address 10. Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?TTL 11. Which command can be used on a Windows host to display the routing table?netstat –s 12. What information is added during encapsulation at OSI Layer 3?source and destination MAC 13. How does the network layer use the MTU value?The network layer depends on the higher level layers to determine the MTU. 14. Which characteristic describes an IPv6 enhancement over IPv4?IPv6 addresses are based on 128-bit flat addressing as opposed to IPv4 which is based on 32-bit hierarchical addressing. 15. When an IP packet is sent to a host on a remote network, what information is provided by ARP?the IP address of the destination host 16. How does the ARP process use an IP address?to determine the MAC address of the remote destination host 17. The ARP table in a switch maps which two types of address together?Layer 3 address to a Layer 2 address* 18. What is one function of the ARP protocol?obtaining an IPv4 address automatically 19. Which router component holds the routing table, ARP cache, and running configuration file?RAM* 20. What type of information is contained in an ARP table?switch ports associated with destination MAC addresses 21. A PC is configured to obtain an IP address automatically from network 192.168.1.0/24. The network administrator issues the arp –a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?This is a static map entry.* 22. A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?ipconfig /all 23. What is a function of ARP?resolving MAC addresses to IPv4 addresses 24. What is the purpose of ARP in an IPv4 network?to forward data onward based on the destination IP address 25. Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?It drops the frame. 26. Which destination address is used in an ARP request frame?0.0.0.0 27. What addresses are mapped by ARP?destination MAC address to a destination IPv4 address* 28. What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?It initiates an ARP request. 29. Which two ICMPv6 messages are used during the Ethernet MAC address resolution process? (Choose two.)router solicitation 30. A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt. 31. Which command is used to encrypt all passwords in a router configuration file?Router_A
(config) # enable secret 32. Company policy requires using the most secure method to safeguard access to the privileged exec and configuration mode on the routers. The privileged exec password is trustknow1. Which of the following router commands achieves the goal of providing the highest level of security?secret
password trustknow1 33. What will be the response from the router after the command, “router(config)# hostname portsmouth” is entered?portsmouth# 34. An administrator is configuring a new router to permit out-of-band management access. Which set of commands will allow the required login using a password of cisco?Router(config)# line vty 0 4 Router(config)# line vty 0 4 Router(config)# line console 0 Router(config)# line console 0 35. Which command can be used on a Cisco router to display all interfaces, the IPv4 address assigned, and the current status?show ip interface brief* 36. Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting?user EXEC mode 37. What is the purpose of the startup configuration file on a Cisco router?to facilitate the basic operation of the hardware components of a device 38. Which characteristic describes the default gateway of a host computer?the logical address of the router interface on the same network as the host computer* 39. What is the purpose of the banner motd command?It configures a message that will identify printed documents to LAN users. 40. A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?user executive mode 41. What is stored in the NVRAM of a Cisco router?the Cisco IOS 42. Which statement regarding the service password-encryption command is true?It is configured in privileged EXEC mode. What does a switch do with an ARP request?The switch will generate an ARP request whenever it needs to associate an IP address to a MAC address to create and forward a frame. And, in order to forward the frame, the switch looks up the destination MAC address in the CAM table to find the associated physical port and VLAN.
Do switches respond ARP requests?As a layer-2 switch, the switch doesn't get involved with the ARP request/reply, unless it is the target of the ARP request, or it is making the ARP request.
What is the process of an ARP response?ARP broadcasts a request packet to all the machines on the LAN and asks if any of the machines are using that particular IP address. When a machine recognizes the IP address as its own, it sends a reply so ARP can update the cache for future reference and proceed with the communication.
What ARP does when it does not receive a response to the ARP request?What will happen if an ARP reply is not received for an ARP request? If an ARP reply is not received, then that IP address cannot be resolved to an Ethernet address. Without a Ethernet address, the packets cannot be transmitted.
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