Term
| Why has RIP lost favor as opposed to other protocols? |
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Definition
| It lacks the capabilities of many of later protocols. |
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Term
| When and why is RIP a desiriable protocol? |
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Definition
-Smaller networks
-Multi-vendor support is necessary especially with UNIX environments. |
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Term
| What are the enhanced features of RIPv2? |
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Definition
-Classless protocol
-More compatible with modern networks |
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Term
| What do both versions of RIP share in features and limitations? |
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Definition
-Use of holddown and other timers
-Use of split horizon or split horizon with poison reverse
-Use of triggered updates |
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Term
| What type of address must be used when a packet is sent outside your private network? |
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Definition
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Term
| What subnet mask is used when only two ip addresses are needed(point-to-point-link)? |
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Definition
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Term
| What is a loopback interface? |
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Definition
| It is a software-only interface that is used to emulate a physical interface. |
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Term
| What is a loopback address used for in the lab setting? |
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Definition
| They are useful in creating additional networks without having to add more physical interfaces on a router. |
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Term
| What is the command to establish a supernet route? |
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Definition
| R1(config)#ip route [ip address] [subnet mask] Null0 |
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Term
| What does a supernet route do to the routing table? |
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Definition
| Allows a single high-level route entry to represent many lower-level routes there by reducing the size of routing tables. |
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Term
| What are the two characteristics of a null interface? |
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Definition
-You do not need to enter any commands to create or configure the null interface.
-It is always up, but does not forward or receive traffic. |
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Term
| What happens to traffic sent to a null interface? |
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Definition
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Term
| What command will send a route to other routers in the network? |
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Definition
| R1(config-router)#redistribute static |
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Term
| What is the first command you should use to check network connectivity? |
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Definition
| R1#show ip interface brief |
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Term
| What should the result of the show ip interface brief command show? |
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Definition
| If a link is down, the status field or protocol field. |
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Term
| What is not included in a RIPv1 message? |
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Definition
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Term
| What can happen when RIP has two routes to the same network? |
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Definition
| Split Horizon rule is implemented |
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Term
| What are the two methods RIPv1 uses to determine the subnet mask for an ip address? |
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Definition
| Summarizes the subnets to classful boundary uses the subnet mask of the outgoing interface to determine which subnets to advertise. |
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Term
| What type of packet is a RIPv2 encapsulated in? |
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Definition
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Term
| What port number does RIPv2 packet use? |
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Definition
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Term
| How many routes included in the RIPv2 packet? |
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Definition
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Term
| What are the extensions added to RIPv2? |
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Definition
-The subnet mask field that allows a 32 bit mask to be included in the RIP route entry.
-The addition of the Next Hop address. |
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Term
| What does a router running RIPv1 do with a RIPv2 update? |
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Definition
| A RIPv1 router will just ignore the RIPv2 fields in the route entry. |
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Term
| What command is used to modify the version of RIP being used to version 2? |
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Definition
R1(config)#rotuer rip
R1(config-router)#version 2 |
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Term
| What command can be used to revert back to version 1? |
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Definition
R1(config)#router rip
R1(config-router)#version 1 |
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Term
| What is the command to turn off autosummarization? |
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Definition
R1(config)#router rip
R1(config-router)#no auto-summary |
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Term
| What is different in the show ip protocols? |
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Definition
| Automatic networkl summarization is not in effect. |
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Term
| What happens when a route is incremented? |
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Definition
| The update on one interface has its metric incremented before it is sent out another interface. |
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Term
| What type of address is being used for RIPv2 routing updates? |
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Definition
multicast address
224.0.0.9
01.00.5E.00.00.09 |
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Term
| What has been added to RIPv2 routing tables? |
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Definition
| Each subnet mask has its own specific entry,along with the exit interface and next-hop address to reach that subnet. |
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Term
| What is the advantage of using a mutlicast address? |
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Definition
| Multicasts can take up less bandwidth on the network. Requires less processing by devices that are not RIP-enabled. |
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Term
| How does RIPv2 determine the subnet mask for a route? |
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Definition
-classless routing protocol
-VLSM addressing scheme |
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Term
| What is one of the goals of CIDR? |
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Definition
| To provide a mechanism for the aggregation of routing information. |
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Term
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Definition
| Supernets have mask that are smaller than the classful network. |
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Term
| What is a characteristic of a supernet's subnet mask? |
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Definition
| A supernet is a block of contiguous classful networks that is addressed as a single network. |
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Term
| Where should you start when troubleshooting? |
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Definition
-Make sure all of the links are up and operational
-Check the cabling
-Check to make sure you have the correct IP address and subnet mask on each interface
-Remove any uneccessary config commands that are no longer necessary or have been replaced by other commands. |
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Term
| What will the show ip route command verify? |
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Definition
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Term
| What will the show ip interface brief command verify? |
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Definition
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Term
| What will the show ip protocols command verify? |
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Definition
-RIP is enabled
-Version of RIP
-Status of automatic summarization
-the networks that were included in the network statements. |
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Term
| What will the debug ip rip command verify? |
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Definition
| Use to examine the contents of the routing updates that are sent and received by a router. |
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Term
| What will the ping command verify? |
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Definition
| Verify round-trip connectivity |
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Term
| What will the show running-config command verify? |
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Definition
| All commands are currently configured. |
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Term
| What is considered a good place to begin when troubleshoot RIPv2? |
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Definition
| To verify that version 2 is configured on all routers. |
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Term
| What 2 things does the network command do? |
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Definition
-It enables the routing protocol to send and receive updates on any local interfaces that belong to that network.
-Includes that network in its routing updates to its neighboring routers. |
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Term
| What is a security concern for routing updates? |
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Definition
| Accepting invalid routing updates |
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Term
| What are three methods of receiving an invalid updated listed? |
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Definition
-Attacker maliciously attempting to disrupt the network
-Misconfigured router
-Host is attatched to the network and-unknown to its-user-the host is running the routing protocol of the local network. |
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Term
| What is listed as good practice when configuring a rotuing protocol? |
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Definition
| To authenticate routing information transmitted between routers. |
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