Chapter 9 Intro to IP Routing

True/False: RIPv1 is a link state routing protocol.

False, RIP and RIPv2 are both distance vector protocols.

True/False: EIGRP is a nonproprietary routing protocol.

False. EIGRP is a Cisco-proprietary routing protocol.

True/False: RIPv2 is a hybrid routing protocol.

False. RIP and RIPv2 are both distance vector protocols.

What are the two categories of IGP protocols? A. Link state B. Static C. Distance vector D. EGP

A, C. Distance vector (DV) and link state (LS) are the two routing protocols to remember.

What two pieces on information does a router require to make a routing decision? A. Destination network (address) B. Destination MAC address C. Application layer protocol D. Neighbor router

A, D. A frame uses MAC addresses to send a packet on the LAN. The frame will take the packet to either a host on the LAN or a router's interface if the packet is destined for a remote network.

What does the acronym IGRP stand for? A. Interior Gateway Routing Protocol B. Inside Gateway Redundancy Protocol C. Interior Group Reliability Protocol D. Interior Gateway Redundancy Protocol

A. Interior Gateway Routing Protocol is a distance vector (DV) interior gateway protocol.

Where does a frame have to carry a packet if it is destined for a remote network? A. Default gateway B. Neighbor host C. Switch D. Hub

A. Packets specifically have to be carried to a router in order to be routed through a network

What type of request must a client send if it does not know the destination MAC address? A. ARP broadcast B. Multicast C. ICMP redirect D. Reverse ARP

A. This is step 6 in the IP routing process. If the hardware address isn't in the ARP cache of the host, an ARP broadcast is sent out onto the local network to search for the hardware address.

When are you most likely to see a Request Timed Out message? A. When an unknown error has occurred B. When you have used the arp -a command incorrectly C. When a known error has occurred D. When you are using a hybrid routing protocol

A. You are most likely to see a Request Timed Out message when (if) a packet is lost on the way back to the originating host for an unknown error. Remember, if the error occurs because of a known issue, you are likely to see a Destination Unreachable message.

An ___ is a collection of networks or subnets that are in the same administrative domain.

Autonomous system

Where along the IP routing process does a packet get changed? A. Router B. Host A C. Destination device D. Host B

C. Remember that the frame changes at each hop but that the packet is never changed in any way until it reaches the destination device.

Which of the following is true for MAC addresses? A. MAC addresses are never local on the LAN and always pass through a router B. MAC addresses are always local on the LAN and never go through or past a router C. MAC addresses will always be the IP address of Fa0/0 interface D. None of the above

B. Media Access Control (MAC) addresses are always local on the LAN and never go through and past a router.

Which of the following is a hybrid routing protocol? A. RIPv2 B. EIGRP C. IS-IS D. IGRP

B. The only protocol you could select it Enhanced Interior Gateway Routing Protocol (EIGRP).

Which of the following are link state protocols? A. RIPv1 B. RIPv2 C. OSPF D. IS-IS E. IGRP

C, D. Open Shortest Path First (OSPF) and Intermediate System-to-Intermediate System (IS-IS) are link state (LS) routing protocols.

What EGP protocol is used on the internet? A. GGP B. EGP C. BGP D. IGP

C. Border Gateway Protocol (BGP) is the most popular choice for ISPs or really large organizations.

Which of these best describes dynamic routing? A. All network addresses must be hand-typed into the routing table B. Only a portion of the network addresses must be hand-typed into the routing table C. Routing tables are updated automatically when changes occur in the network D. A and B

C. In dynamic routing, routers update each other about all the networks they now about and place this information into the routing table. This is possible because a protocol on one router communicates with the same protocol running on neighbor routers. If changes occur in the network, a dynamic routing protocol automatically informs all routers about the event.

Which is not a routing protocol? A. RIP B. RIPv2 C. RIPv3 D. EIGRP

C. RIP, RIPv2, and EIGRP are all examples of routing protocols.

Which of the following is not a distance vector protocol? A. RIPv1 B. RIPv2 C. OSPF D. IGRP

C. RIPv1 and 2 and IGRP are all distance vector (DV) protocols. Routers using a DV protocol send all or parts of their routing table in a routing-update message at regular intervals to each of their neighbor routers.

What is it called when protocols update their forwarding tables after changes have occurred? A. Name resolution B. Routing C. Convergence D. ARP resolution

C. Routing convergence is the time required by the routing protocols to update the routing tables (forwarding tables) on all routers in the network.

You need to perform maintenance on a router in your corporate office. It is important that the network does not go down. What can you do to accomplish your goal? A. Configured BGP on the router B. Implement NAT on the router C. Configure on the router a static route that temporarily reroutes traffic through another office D. Implement convergence on the router

C. The best answer would be to reroute traffic using a temporary static route until the maintenance is complete on the router.

What happens when a router receives a packet for a network that isn't listed in the routing table? A. It forwards the packet to the next available router B. It holds the packet until the address is updated in the routing table C. The router will use RIP to inform the host that it can't send the packet D. None of the above

D. A router will not send a broadcast looking for the remote network - the router will discard the packet.

Which is true regarding dynamic routing? A. Static routes are best in large networks and thus better to use than dynamic routing protocols B. Static routes are automatically added to the routing table but dynamic routes must be added by hand C. You must use a DNS and WINS server when configuring dynamic routing D. Dynamic routes are automatically added to the routing table

D. Dynamic routing scales well in large networks and routes are automatically added into the routing table. Static routing is done by hand, one route at a time into each router.

What command would be used to view the ARP cache on your host? A. C:\ >show ip route B. C:\ >show ip arp C. C:\ >show protocols D. C:\ >arp -a

D. The arp -a command will show the ARP cache on your host.

When all routers in a network agree about the path from one point to another, the network is said to be what? A. Dynamic B. Static C. Secure D. Converged

D. When the routing tables are complete because they include information about all networks in the internetwork, they are considered converged.

You need a routing protocol that can be run in a very large network with routers from multiple vendors. What routing protocol would be your best choice?

RIP does not work well in large networks, so OSPF would be the best answer, and both RIP and OSPF are nonproprietary.

Which type of routing are you performing if you have to go to each router and type in each network and the path that IP will use to send packets?

Static routing

A server has received a packet from your remote host. What will be the destination IP address of the packet?

The IP address of the server.

You are trying to reach a server on another subnet. What will be the destination IP address of a packet sent from your host?

The IP address of the server.

A server has received a frame from your remote host. What will be the source hardware address of the frame?

The MAC address of the router sending the frame to the server.

You are trying to reach a server on another subnet. What will be the destination hardware address of a frame sent from your host?

The MAC address of your default gateway (router).