Question 1.
Place the following routing protocols in order of least to greatest administrative distance:

1. OSPF
2. EIGRP Internal
3. EIGRP External
4. IGRP
5. RIP

a) 1,2,3,4,5
b) 2,4,1,5,3
c) 2,3,1,4,5
d) 2,1,4,5,3
e) 1,2,4,5,3

Answer

Question 2.
Examine the following diagram of the Acme network:

The tier 1 router is connected to two tier 2 routers. Each tier 2 router is connected to fifty tier 3 routers via frame-relay PVCs. EIGRP runs throughout. What strategy could you use to limit the size of the routing table on the tier 1 router?

a) Compression on the tier 2 routers
b) Increase the hello and hold timers on the tier 2 routers
c) Route summarization on the tier 2 routers
d) Disable queries on the tier 2 routers

Answer

Question 3.
An EIGRP stuck-in-active event occurs when:

a) a route update does not arrive within a prescribed amount of time
b) a hello packet is not acknowledged
c) the hold timer expires
d) a query receives no response

Answer

Answers

Question 1.
Place the following routing protocols in order of least to greatest administrative distance:

1. OSPF
2. EIGRP Internal
3. EIGRP External
4. IGRP
5. RIP

a) 1,2,3,4,5
b) 2,4,1,5,3
c) 2,3,1,4,5
d) 2,1,4,5,3
e) 1,2,4,5,3

Answer
b) 2,4,1,5,3

Explanation
Administrative distances are as follows:

EIGRP Internal = 90

IGRP = 100

OSPF = 110

RIP = 120

EIGRP External = 170
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Question 2.
Examine the following diagram of the Acme network:

The tier 1 router is connected to two tier 2 routers. Each tier 2 router is connected to fifty tier 3 routers via frame-relay PVCs. EIGRP runs throughout. What strategy could you use to limit the size of the routing table on the tier 1 router?

a) Compression on the tier 2 routers
b) Increase the hello and hold timers on the tier 2 routers
c) Route summarization on the tier 2 routers
d) Disable queries on the tier 2 routers

Answer
c) Route summarization on the tier 2 routers

Explanation
Route summarization (combined with a good hierarchical addressing design) could be used to summarize the tier 3 networks and send fewer routes to the tier 1 router.

Neither a, b or d would do anything to decrease the size of the routing table (though they may help the network in other ways).
[3721]

Question 3.
An EIGRP stuck-in-active event occurs when:

a) a route update does not arrive within a prescribed amount of time
b) a hello packet is not acknowledged
c) the hold timer expires
d) a query receives no response

Answer
d) a query receives no response

Explanation
A stuck-in-active (SIA) event occurs when an EIGRP query for a better route receives no reply.
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