Chapter 8: Advanced Routing Protocols
TRUE/FALSE
1. Classful routing protocols can be used in networks with either discontiguous subnets or networks using
variable length subnet masks (VLSM).
2. The message update format in RIPv1 does not have room for subnet mask information in the IP
address field.
3. In general, due to the complexity of modern networks and the use of VLSMs, which require subnet
mask information to be sent with update messages, most networks use classful routing protocols.
4. EIGRP uses nonperiodic, partial, and bounded routing table updates.
5. OSPF is ideally suited for large networks because it can use a concept known as areas to bound
link-state advertisements.
MULTIPLE CHOICE
1. In general, ____ routing protocols send periodic updates of the entire routing table to their directly
connected neighbors.
a.
link-state
c.
exterior gateway
b.
distance-vector
d.
interior gateway
2. In general, ____ routing protocols flood nonperiodic link-state advertisements of only changed routes
throughout the entire internetwork.
a.
link-state
c.
exterior gateway
b.
distance-vector
d.
interior gateway
3. ____ routing protocols cannot adapt to work in an environment where discontiguous networks or
VLSM exist.
a.
RIPv1
c.
Classful
b.
Classless
d.
Class-oriented
4. The four bytes set aside for the ____ field allow RIPv2 to send the full 32-bit subnet mask for each
network configured on the router’s interfaces.
a.
Next Hop
c.
Address Family Identifier
b.
IP Address
d.
Subnet Mask
5. The ____ command switches RIP to version 2.
a.
version 2
c.
rip2
b.
no auto–summary
d.
rip 2 on
6. The ____ command overrides RIPv2’s default behavior of summarizing to major network boundaries.
a.
no default
c.
auto–summary off
b.
no default summary
d.
no auto–summary
7. RIP authentication can occur either by passing the authentication keys in clear text or via ____
authentication.
a.
SSH
c.
MD5
b.
RC4
d.
SHA
8. Although it is often described as a hybrid protocol containing the features of both distance-vector and
link-state protocols, EIGRP is still a ____ routing protocol at its core.
a.
link-state
c.
link-vector
b.
distance-vector
d.
distance-state
9. EIGRP uses the same metric as IGRP multiplied by ____.
a.
32
c.
128
b.
64
d.
256
10. ____ allow EIGRP to support multiple Network layer routed protocols such as IP, IPX, and
AppleTalk.
a.
Neighbor discovery and maintenance
c.
Reliable Transport Protocol
b.
Protocol Dependent Modules
d.
Diffusing Update Algorithm (DUAL)
11. ____ allow EIGRP to discover neighbors and keep track of their status.
a.
Reliable Transport Protocol
c.
Neighbor discovery and maintenance
b.
Protocol Dependent Modules
d.
Diffusing Update Algorithm (DUAL)
12. EIGRP uses multicast address ____ to multicast Hello packets every five seconds on most networks of
T1 speed or greater.
a.
224.0.0.10
c.
255.255.0.10
b.
224.224.0.1
d.
255.255.255.10
13. Because EIGRP is protocol-independent, it cannot use existing Transport layer protocols to carry its
various packet types. Instead, Cisco developed an entirely new layer 4 protocol, the ____, for use by
EIGRP.
a.
Protocol Dependent Modules (PDM)
c.
Neighbor discovery and maintenance
b.
Reliable Transport Protocol (RTP)
d.
Diffusing Update Algorithm (DUAL)
14. DUAL uses the ____ topology table to track the status of all links in a network.
a.
EIGRP
c.
RIPv1
b.
OSPF
d.
RIPv2
15. The ____ table contains information about all the networks a router can reach.
a.
RIP neighbors
c.
EIGRP topology
b.
OSPF status
d.
RIPv1 topology
16. In EIGRP, ____ is a good state, as it means all DUAL computations have been completed and the
route is stable.
a.
active
c.
down
b.
fixed
d.
passive
17. ____ is an open standards, link-state routing protocol that supports classless routing, variable-length
subnet masks, and authentication.
a.
OSPF
c.
RIPv1
b.
EIGRP
d.
IGRP
18. In OSPF, a(n) ____ is the portion of a network within which LSAs are contained.
a.
domain
c.
container
b.
segment
d.
area
19. A(n) ____ in OSPF is a router’s interface.
a.
link-state
c.
link
b.
cost
d.
area
20. In OSPF, the ____ database contains information about all OSPF peers with which a router has
successfully exchanged Hello packets.
a.
link-state
c.
cost
b.
adjacencies
d.
topological
21. OSPF uses a(n) ____ database, which holds the common view of the network formed from the
link-state advertisements that are received.
a.
adjacencies
c.
link-state
b.
designated routers
d.
topological
COMPLETION
1. ____________________ routing protocols summarize networks to their major network boundaries
(Class A, B, or C) and do not carry subnet mask information in their routing table updates.
2. ____________________ routing protocols offer the ability to carry subnet mask information in the
routing table updates.
3. __________________________________________________ is a Cisco proprietary protocol designed
to overcome the limitations found in IGRP.
4. ___________________________________ allow EIGRP to carry multiple routed protocols within
their own native packet formats.
5. The ___________________________________ is the heart and soul of EIGRP, and is the reason that
EIGRP can quickly recover from a link outage and route around network problems.
MATCHING
Match each item with a statement below:
a.
RIPv1
f.
MTU
b.
EIGRP
g.
Hello packets
c.
MD5
h.
Routing table updates
d.
Hash
i.
Reliable multicast
e.
Bandwidth
1. the speed of the link
2. a classful routing protocol
3. allow EIGRP neighbors to determine if routing peers are still online and available
4. allows RIPv2 to authenticate a routing peer without sending the secret key (a text string) across the
link between the two peers
5. a classless routing protocol
6. a number generated by MD5 from the secret key
7. a feature of RTP that requests an acknowledgment via unicast to a multicast message
8. an example of an EIGRP packet type that uses reliable multicast via RTP
9. the maximum datagram size allowed on a link
SHORT ANSWER
1. Describe the Routing Information Protocol version 2.
2. How does RIPv2 authenticate routing peers?
3. What are the steps required to configure RIPv2 authentication?
4. Describe the Enhanced Interior Gateway Routing Protocol (EIGRP).
5. What are the six factors used by EIGRP to calculate a route metric?
6. What are the major components of EIGRP?
7. What are some of the key terms associated with the Diffusing Update Algorithm (DUAL)?
8. What are the steps for configuring EIGRP authentication?
9. Describe the Open Shortest Path First (OSPF) protocol.
10. Briefly describe OSPF authentication.