CompTIA Network+ exam Chapter 9

What is autonomous system?

A collection of subnets that are in the same administrative domain

What type of request must a client send if it does not know the destination MAC address?

ARP broadcast 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.

What does the acronym IGRP stand for?

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

What are the two categories of IGP protocols?

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

Where are MAC addresses on a network?

MAC addresses are always local on the LAN and never go through and past a router.

Which of the following is true for MAC addresses?

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

What happens when a router receives a packet for a network that isn't listed in the routing table?

None of the above. A router will not send a broadcast looking for the remote network-the router will discard the packet.

Which of the following is a dynamic routing protocol?

OSPF

Which of the following is not a distance vector protocol?

OSPF 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 a regular interval to each of their neighbor routers.

Which two of the following are link state protocols?

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

Drag the protocols to match them with their Interior Gateway Protocol (IGP) types.

Protocol IGP Type 1. OSPF A. Link State 2. RIPv1 & 2 B. Distance Vector 3. IS-IS A. Link State 4. IGRP B. Distance Vector

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 is not a routing protocol?

RIPv3 RIP, RIPv2, and EIGRP are all examples of routing protocols.

Where does a Data Link layer frame have to carry a Network layer packet if the packet is destined for a remote network?

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

What will you look at to check the path IP will use to forward a packet through a router?

Routing table

Which of these best describes dynamic routing?

Routing tables are updated automatically when changes occur in the network.

Fill in the blanks with the appropriate terms from the lists.

An autonomous system is a collection of networks or subnets that are in the SAME administrative domain. An autonomous system is also sometimes referred to as a ROUTING domain.

Fill in the blank with the appropriate term. An ____ is a collection of networks or subnets that are in the same administrative domain.

An autonomous system is a collection of networks or subnets that are in the SAME administrative domain. You control and set the policy for what happens in the network or autonomous system.

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

Autonomous system

Which of the following is the protocol for an EGP (exterior gateway protocol)?

BGP

What EGP protocol is used on the Internet?

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

What command would be used to view the ARP cache on your host?

C:\ >arp -a

To view the ARP cache on your host

C:\>arp -a Interface: 172.16.10.2 --- 0x3 Internet Address Physical Address Type 172.16.10.1 00-15-05-06-31-b0 dynamic

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?

Configure on the router a static route that temporarily reroutes traffic through another office. The best answer would be to reroute traffic using a temporary static route until the maintenance is complete on the router.

You need to perform maintenance on a router and need to temporarily reroute traffic through another office. Which would be the best way to perform this action?

Configure static routing.

When all routers in a network agree about the path from one point to another, the network is said to be what?

Converged

What is it called when protocols update their forwarding tables after changes have occurred?

Convergence

Where does a frame have to carry a packet if it is destined for a remote network?

Default gateway

Where along the IP routing process does a packet get changed?

Destination device

What two pieces of information does a router require to make a routing decision? (Choose two.)

Destination network (address) Neighbor router 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.

To be capable of routing packets, a router must know at least the following information

Destination network address Neighbor routers from which it can learn about remote networks Possible routes to all remote networks The best route to each remote network How to maintain and verify routing information

Which is true regarding dynamic routing?

Dynamic routes are automatically added to the routing table. 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.

Fill in the blanks by selecting the term from the list and dragging the correct terms onto their corresponding boxes, whichever is applicable.

Dynamic routing is a networking technique in which a protocol on ONE router communicates with the SAME protocol running on neighbor ROUTERS. The routers then UPDATE each other about all the NETWORKS they know and place this information into the ROUTING table.

Which of the following is a hybrid routing protocol?

EIGRP

Execute the command to display the current ARP entries by interrogating the current protocol.

Execute the arp -a command to display the current ARP entries by interrogating the current protocol. The arp command displays, adds, and removes arp information from network devices.

True/False: EIGRP is a nonproprietary routing protocol.

False EIGRP is a Cisco-proprietary routing protocol.

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

False RIP and RIPv2 are both distance vector protocols.

True/False: RIPv2 is a hybrid routing protocol

False RIP and RIPv2 are both distance vector protocols.

True/False: RIPv2 is a hybrid routing protocol.

False RIP and RIPv2 are both distance vector protocols.

The OSI model uses an encapsulation method to describe the data as it is encapsulated at each layer. What is the encapsulation named at the Data Link layer?

Frames The Data Link layer is responsible for encapsulating IP packets into frames and for providing logical network addresses.

Drag the command used to view the ARP cache on your host from the right onto the box to the left.

To view the ARP cache on your host, the arp -a command is used. It displays current ARP cache tables for all interfaces. The arp -d <IP address> command removes the listed entry from the ARP cache. The arp -s <MAC address> command adds a static entry to the ARP cache.

When are you most likely to see a Request Timed Out message?

When an unknown error has occurred 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.

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)