CNA - Modules 8-10 - Communicating Between Networks Assessment
It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.
Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address? It is the IP address of the ISP network device located in the cloud. It is the IP address of the Router1 interface that connects the company to the Internet. *It is the IP address of the Router1 interface that connects the PC1 LAN to Router1. It is the IP address of Switch1 that connects PC1 to other devices on the same LAN.
the MAC address of the G0/0 interface on R1
Refer to the exhibit. 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 the MAC address of the G0/0 interface on R2 the MAC address of S2 the MAC address of File_server1 the MAC address of the G0/0 interface on R1
Network attackers could manipulate MAC address mappings in ARP messages with the intent of intercepting network traffic.
What are two potential network problems that can result from ARP operation? (Choose two.) Multiple ARP replies result in the switch MAC address table containing entries that match the MAC addresses of hosts that are connected to the relevant switch port. Manually configuring static ARP associations could facilitate ARP poisoning or MAC address spoofing. Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic. Large numbers of ARP request broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network. *On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.
destination MAC address
What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward? Ethernet type source IP address destination MAC address destination IP address source MAC address
connectionless
What is a basic characteristic of the IP protocol? reliable end-to-end delivery media dependent user data segmentation connectionless
efficient packet handling
What is one advantage that the IPv6 simplified header offers over IPv4? smaller-sized header little requirement for processing checksums efficient packet handling smaller-sized source and destination IP addresses
The contents of NVRAM will change.
What is the effect of using the Router# copy running-config startup-config command on a router? The contents of NVRAM will change. The contents of ROM will change. The contents of RAM will change. The contents of flash will change.
The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.
What property of ARP forces all Ethernet NICs to process an ARP request? The type field 0x806 appears in the header of the Ethernet frame. The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame. ARP replies are broadcast on the network when a host receives an ARP request. The source MAC address appears in the header of the Ethernet frame.
remote routes
What routing table entry has a next hop address associated with a destination network? remote routes local routes C and L source routes directly-connected routes
The computer has an invalid default gateway address.
A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem? The computer has an invalid IP address. The cable is not connected properly to the NIC. The computer has an incorrect subnet mask. The computer has an invalid default gateway address.
The configuration file is missing from NVRAM.
A router boots and enters setup mode. What is the reason for this? The POST process has detected hardware failure. Cisco IOS is missing from flash memory. The IOS image is corrupt. The configuration file is missing from NVRAM.
They have to keep their own local routing table that contains a route loopback interface, a local network route, and a remote default route.
How do hosts ensure that their packets are directed to the correct network destination? They search in their own local routing table for a route to the network destination address and pass this information to the default gateway. 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. They always direct their packets to the default gateway, which will be responsible for the packet delivery. They send a query packet to the default gateway asking for the best route.
192.168.167.166
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)# end Refer 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? 10.166.167.254 198.51.100.189 192.168.167.166 192.168.166.46 192.168.167.1
The switch can be remotely managed from a host on another network.
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 can be remotely managed from a host on another network. The switch will have a management interface with the address 172.16.100.1. The switch is limited to sending and receiving frames to and from the gateway 172.16.100.1. *The switch can communicate with other hosts on the 172.16.100.0 network.
ARP is used to discover the IP address of any host on a different network.
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. ARP is used to discover the MAC address of any host on the local network. ARP is used to discover the IP address of any host on the local network. ARP is used to discover the MAC address of any host on a different network.
The host cannot communicate with other hosts on the local network.
What will happen if the default gateway address is incorrectly configured on a host? The host will have to use ARP to determine the correct address of the default gateway. The switch will not forward packets initiated by the host. The host cannot communicate with other hosts in the local network. The host cannot communicate with hosts in other networks. A ping from the host to 127.0.0.1 would not be successful.
Flow Label
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? Traffic Class Next Header Differentiated Services Flow Label
ARP cache
Where are IPv4 address to Layer 2 Ethernet address mappings maintained on a host computer? neighbor table ARP cache routing table MAC address table
FFFF.FFFF.FFFF
Which destination address is used in an ARP request frame? AAAA.AAAA.AAAA the physical address of the destination host 0.0.0.0 255.255.255.255 FFFF.FFFF.FFFF
the lower metric value that is associated with the destination network
Which parameter does the router use to choose the path to the destination when there are multiple routes available? the lower gateway IP address to get to the destination network the higher gateway IP address to get to the destination network the lower metric value that is associated with the destination network the higher metric value that is associated with the destination network
IP relies on upper layer services to handle situations of missing or out-of-order packets.
Which statement describes a feature of the IP protocol? MAC addresses are used during the IP packet encapsulation. IP relies on Layer 2 protocols for transmission error control. IP encapsulation is modified based on network media. *IP relies on upper layer services to handle situations of missing or out-of-order packets.
They are received and processed by every device on the local network.
Which statement describes the treatment of ARP requests on the local link? They are received and processed only by the target device. They must be forwarded by all routers on the local network. They are received and processed by every device on the local network. They are dropped by all switches on the local network
version
Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100? TTL protocol version source IPv4 address
login line console 0 password cisco
Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three.) line vty 0 4 login line console 0 interface fastethernet 0/0 password cisco enable secret cisco
path selection packet forwarding
Which two functions are primary functions of a router? (Choose two.) flow control domain name resolution path selection microsegmentation packet forwarding
neighbor solicitation neighbor advertisement
Which two types of IPv6 messages are used in place of ARP for address resolution? anycast *neighbor solicitation broadcast echo request echo reply *neighbor advertisement
The default gateway address is used to forward packets originating from the switch to remote networks.
Within a production network, what is the purpose of configuring a switch with a default gateway address? Hosts that are connected to the switch can use the switch default gateway address to forward packets to a remote destination. A switch must have a default gateway to be accessible by Telnet and SSH. It provides a next-hop address for all traffic that flows through the switch. The default gateway address is used to forward packets originating from the switch to remote networks.
