Module 8-10 Exam

What is the startup process of the Cisco router?

POST -> IOS -> startup config

What IPv4 header field identifies the upper layer protocol carried in the packet? -Identification -Protocol -Version -Differentiated Services

Protocol

Which parameter does the router use to choose the path to the destination when there are multiple routes available? -the lower metric value that is associated with the destination network -the higher gateway IP address to get to the destination network -the higher metric value that is associated with the destination network -the lower gateway IP address to get to the destination network

the lower metric value that is associated with the destination network

Which term describes a field in the IPv4 packet header used to limit the lifetime of a packet?

TTL

What are two potential network problems that can result from ARP operation? (Choose two.) -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. -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. -On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.

-Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic. -On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.

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 destination address in the frame is a known unicast address. -The source address in the frame is a multicast address. -The frame has the broadcast address as the destination address. -The source address in the frame header is the broadcast address. -The destination address is unknown to the switch.

-The frame has the broadcast address as the destination address. -The destination address is unknown to the switch.

What are two services provided by the OSI network layer? (Choose two.) -routing packets toward the destination -collision detection -performing error detection -encapsulating PDUs from the transport layer -placement of frames on the media

-routing packets toward the destination -encapsulating PDUs from the transport layer

Why is NAT not needed in IPv6?​ -Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​ -Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.​ -The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet. -The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.​

Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​

Which statement describes a feature of the IP protocol? -IP relies on upper layer services to handle situations of missing or out-of-order packets. -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.

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 detailed information of the ARP cache is displayed. -The ARP cache is synchronized with the router interface. -The current content of the ARP cache is displayed. -The ARP cache is cleared.

The ARP cache is cleared.

Within a production network, what is the purpose of configuring a switch with a default gateway address? -The default gateway address is used to forward packets originating from the switch to remote networks. -It provides a next-hop address for all traffic that flows through the switch. -A switch must have a default gateway to be accessible by Telnet and SSH. -Hosts that are connected to the switch can use the switch default gateway address to forward packets to a remote destination.

The default gateway address is used to forward packets originating from the switch to remote networks.

What is a basic characteristic of the IP protocol? -user data segmentation -connectionless -reliable end-to-end delivery -media dependent

connectionless

What is the aim of an ARP spoofing attack? -to flood the network with ARP reply broadcasts -to fill switch MAC address tables with bogus addresses -to overwhelm network hosts with ARP requests -to associate IP addresses to the wrong MAC address

to associate IP addresses to the wrong MAC address