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CISCO 3 MODULE
1 STUDY GUIDE 1. VLSM stands for: Variable Length Subnet Masking 2. The purpose VLSM was designed was to: Conserve
IP addresses when using IPv4, maximizing the number of useable IP
addresses available in a network. 3. Dynamic routing protocols that support VLSM include:
4.
VLSM is sometimes referred to as __________________________. Subnetting
a subnet 5.
What is an “autonomous system”? it’s
a network used in one enterprise 6.
What is meant by “route
aggregation”? It’s
the same thing as route summarization; it’s a way to summarize more
than 1 route with one route entry in a router’s routing table. 7.
How can you take advantage of route aggregation using VLSM? Make
sure your VLSM routes are not distant from each other. This way routes
can be aggregated into one route in the routing table. 8.
Is RIP v. 1 a classful or classless protocol? RIP v. 2? What does
this mean? RIP
v. 1 is classful; RIP v. 2 is classless. It means that RIP v. 1 must
stay within the “normal” IP class system (A, B, C); classless means
RIP v. 2 can use VLSM. 9.
Because it’s a new protocol, can RIP v. 2 hop more than 16
times? No.
It still has many of the same characteristics of RIP v. 1, including hop
count max of 16. 10.
What is the configuration command to start RIP v. 2 running? Router(config)#router
rip Router(config-router)#version
2 Router
(config-router)#network [attached network(s)] or Router(config)#router
rip ver 2 11.
What show commands can you use to ensure that RIP v. 2 has
started running? show
ip route show
ip protocols 12.
What is the command to flush (clear) the routing table to force
an update? clear
ip route * 13.
What will you see if you use the debug ip rip command? You’ll
see all the RIP updates as they are sent and received by the router. 14.
How do you turn off the debugging function? Add
“no” to the same command you used to turn it on, or you can use the
“no debug all” to turn off all debugging. 15.
What are the three (3) ways that routers learn about routes
(networks)? Briefly explain each one. ·
Static routing -
additions to the routing table put in by the network administrator ·
Dynamic routing –
additions to the routing table are added automatically as routers update
themselves using protocols ·
Default routes - default
routes added to the routing table by the network administrator that
indicates the path to take when there is no known route to the
destination 16.
What are the two commands that can be used to enter a default
route? ip route [network no.] [subnet mask] [next hop IP
address] ip default-network [network to use as default] 17.
If you want to use the ip route command to specify a
default network, how would you enter it? ip
route 0.0.0.0 0.0.0.0 [next hop IP address] |
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