TCOM 515 Midterm Exam Spring 2005

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Oct 24, 2013 (3 years and 7 months ago)

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TCOM 515 Midterm Exam

Spring 2005


Multiple Choice Questions 1
-
15. Chose the single best answer.

1

Which RIP timer is the longest by default?

a)

Flush

b)

Hold
-
down

c)

Update

d)

Expiration


2

Network devices manipulate the TTL value for what function?

a)

Ping

b)

Telent

c)

FTP

d)

Trac
eroute


3

The last address in a subnet is:

a)

Broadcast address

b)

Network address

c)

Default address

d)

Host address


4

What level of mode must you be in to turn up an interface?

a)

Configuration

b)

Enable

c)

Superuser

d)

User


5

Which protocol gives the network administrator the abil
ity to change a metric
for a single link?

a)

RIP

b)

OSPF

c)

Static


6

In RIP terms, what constitutes infinity?

a)

255

b)

16

c)

20

d)

254



7

What is the boundary that requires the use of an EGP?

a)

OSPF Area

b)

Autonomous System

c)

Static Route

d)

Subnet


8

In a network with 10 routers with loo
pbacks, 15 point
-
to
-
point links and 3 LAN
segments of /28 size, how many RIP update packets does each router send
every 30 seconds?

a)

0

b)

1

c)

2

d)

3


9

What IP address is the first choice as the OSPF Router ID?

a)

Loopback Interface

b)

Ethernet Interface

c)

Virtual Link

d)

Ser
ial Interface


10

What is the network address of 10.12.152.73/26?

a)

10.12.152.0

b)

10.0.0.0

c)

10.12.152.127

d)

10.12.152.64


11

Which of these terms do NOT describe 0.0.0.0?

a)

Default route

b)

Route of last resort

c)

Primary route

d)

Quad zero


12

Which of these is not an OSPF Area Typ
e?

a)

Backbone

b)

Stubby

c)

Not So Stubby

d)

Super Stubby


13

OSPF Neighbors must agree on all of the following except:

a)

Authentication

b)

Router Type

c)

Area ID

d)

Network Mask


14


If the next hop of a static route is an IP address, that IP address must exist:

a)

in another static r
oute

b)

in a routing protocol

c)

in the routing table

d)

on a loopback interface


15

Which one of these other router types could an Area Border router also be?

a)

Internal router

b)

External router

c)

Backbone router

d)

Stub router

Matching Questions 16


20 Each letter mayb
e used more than once.


Match the route type to the associated administrative distance.

16. Static Route to an IP address

17. RIP route

18. Static route to an Interface

19. OSPF route

20. Directly Connected route


a. 0

b. 1

c. 110

d. 120



Matching Ques
tions 21


25 Each letter maybe used only once.

21)

Authentication

22)

Convergence

23)

Hello Mechanism

24)

Routing Algorithm

25)

Split Horizon


a. How a protocol finds its neighbors

b. How a protocol determines that a neighbor is allowed to share routing
information

c. Ho
w a protocol prevents routing loops

d. How a protocol reacts to a network topology change

e. How a protocol determines the best route to a destination



Subnetting Questions 26
-
29


You are given 192.168.10.0/23 to address a new network. There are 4 route
rs, 6
point
-
to
-
point links, connecting the routers. There are also 3 LANs. The first
LAN includes 1 router interface, 1 switch, and 12 hosts. The second LAN
includes 2 router interfaces, 1 switch and 50 hosts. The third LAN include 1
router interface,
1 Hub (no address needed for the hub), and 3 hosts. Assume
that each router needs a loopback IP address. Assume that for each point
-
to
-
point link, each router interface needs an IP address. Assume that within each
LAN, every router interface, every swit
ch and every host needs 1 IP address.
Use the smallest subnet possible for each network that meets the addressing
requirements.


26)

What size subnet would you use for the first LAN?

a)

/30

b)

/28

c)

/27

d)

/29


27)

How many /30 subnets did you carve out?

a)

3

b)

4

c)

5


d)

6


28)

What is t
he largest subnet that you used?

a)

255.255.255.224

b)

255.255.255.192

c)

255.255.255.128

d)

255.255.255.0


29)

How many usable IP address are there in a /27?

a)

28

b)

29

c)

30

d)

31











Static Routing Questions 30
-
33. Chose the single best answer, based on
the diagram.



Ro
uter Loopbacks

Router 1


192.168.0.1


Router 4


192.168.0.4

Router 2


192.168.0.2


Router 5


192.168.0.5

Router 3


192.168.0.3


30)

From Router 1’s perspective, what is the best correct next hop for a static
route to Router 2?

a)

192.168.1.21

b)

Ethernet 1

c)

192.168.1
.5


d)

Ethernet 2


31)

How many static routes would be configured on router 3 to reach all Ethernet
and Loopback IP addresses?

a)

7

b)

6


c)

5

d)

4


32)

Which router would require the most static routes to reach all Ethernet and
loopback IP addresses in the network?

a)

Router 1

b)

Ro
uter 2

c)

Router 4

d)

Router 5




33)

Which of these static routes on Router 2 would not work?

a)

Ip route 192.168.0.1 255.255.255.255 192.168.1.6

b)

Ip route 192.168.1.12 255.255.255.252 ethernet1

c)

Ip route 192.168.1.16 255.255.255.252 ethernet1

d)

Ip route 192.168.0.4 255.2
55.255.255 192.168.0.9



RIP Routing Questions 34
-
38. Chose the single best answer, based on the
diagram.




Router Loopbacks

Router 1


192.168.0.1


Router 4


192.168.0.4

Router 2


192.168.0.2


Router 5


192.168.0.5

Router 3


192.168.0.3


Router 6


192.
168.0.6



34)

Assuming all routers are running RIP on all their interfaces and networks, how
many RIP routing entries would Router 5 have?

a)

6

b)

7

c)

8

d)

9


35)

What would Router 3’s metric to 192.168.1.20/30 be?

a)

1

b)

2

c)

3

d)

4


36)

Which route would be poison reversed in RIP adverti
sements sent out Router
5’s Ethernet0 interface?

a)

192.168.1.12/30

b)

192.168.1.4/30

c)

192.168.1.16/30

d)

192.168.1.20/30


37)

From Router 1’s perspective, which route has the highest metric?

a)

192.168.0.3/32

b)

192.168.0.5/32

c)

192.168.1.16/30

d)

192.168.1.8/30


38)

Which of these r
outers do not have E0 as their next hop for all their RIP
routes?

a)

Router 3

b)

Router 4

c)

Router 5

d)

Router 6



OSPF Routing Questions 39
-
45. Chose the single best answer, based on
the diagram.




Router Loopbacks

Router 1


192.168.0.1


Router 5


192.168.0.5

Ro
uter 2


192.168.0.2


Router 6


192.168.0.6

Router 3


192.168.0.3

`

Router 7


102.168.0.7


Router 4


192.168.0.4



39)

Router 1 is a:

a)

Area Border Router

b)

Backbone Router

c)

Internal Router

d)

External Router


40)

Router 3 is a:

a)

Internal Router

b)

Area Border Router

c)

Autono
mous System Boundary Router

d)

External Router





41)

Router 5 is a:

a)

External Router

b)

Backbone Router

c)

Area Border Router

d)

Autonomous System Boundary Router


42)

Area 200 could not be a:

a)

Stub Area

b)

Backbone Area

c)

Not So Stubby Area

d)

Non
-
backbone, Non
-
stub Area



43)

Build
ing an SPF tree from Router 6’s point of view, what is the best path and
cost to Router 1?

a)

6
-
>4
-
>5
-
>3
-
>1 and 40

b)

6
-
>4
-
>3
-
>1 and 40

c)

6
-
>4
-
>5
-
>3
-
>1 and 30

d)

6
-
>4
-
>3
-
>1 and 30


44)

If Link D’s Cost is raised to = 30, what would Router 6’s best path and cost to
Router

1 be now?

a)

6
-
>4
-
>5
-
>3
-
>1 and 40

b)

6
-
>4
-
>3
-
>1 and 40

c)

6
-
>4
-
>5
-
>3
-
>1 and 50

d)

6
-
>4
-
>3
-
>1 and 50


45)

What cost would you assign to link D to balance traffic between Area 100 and
Area 200 between the paths of Link D and Link E + Link F?

a)

15

b)

20

c)

25

d)

30

Troubleshooting Qu
estions 46
-
50. Chose the single best answer. Use the
output command immediately above it to answer the question. These
commands are not from the same router or the same network.


show ip route

Codes: C
-

connected, S
-

static, I
-

IGRP, R
-

RIP, M
-

mob
ile, B
-

BGP


D
-

EIGRP, EX
-

EIGRP external, O
-

OSPF, IA
-

OSPF inter area


E1
-

OSPF external type 1, E2
-

OSPF external type 2, E
-

EGP


i
-

IS
-
IS, L1
-

IS
-
IS level
-
1, L2
-

IS
-
IS level
-
2, *
-

candidate default


U
-

per
-
user stat
ic route


Gateway of last resort is not set



192.168.0.0/24 is subnetted, 6 subnets

R 192.168.0.1 [120/2] via 192.168.1.21, 00:00:13, Ethernet1/0


[120/2] via 192.168.1.30, 00:00:16, Ethernet1/2

R 192.168.0.2 [120/1] via

192.168.1.21, 00:00:14, Ethernet1/0

C 192.168.0.3 is directly connected, Loopback0

R 192.168.0.4 [120/1] via 192.168.1.9, 00:00:16, Ethernet1/1

R 192.168.0.5 [120/2] via 192.168.1.9, 00:00:16, Ethernet1/1


[120/2] via
192.168.1.30, 00:00:16, Ethernet1/2

R 192.168.0.6 [120/1] via 192.168.1.30, 00:00:16, Ethernet1/2


192.168.1.0/24 is subnetted, 7 subnets

C 192.168.1.8 is directly connected, Ethernet1/1

R 192.168.1.12 [120/1] via 192.168.1.9, 00:00:1
6, Ethernet1/1

R 192.168.1.4 [120/1] via 192.168.1.21, 00:00:14, Ethernet1/0

R 192.168.1.24 [120/1] via 192.168.1.30, 00:00:17, Ethernet1/2

C 192.168.1.28 is directly connected, Ethernet1/2

R 192.168.1.16 [120/1] via 192.168.1.30, 0
0:00:04, Ethernet1/2

C 192.168.1.20 is directly connected, Ethernet1/0


46)

Which of these subnets is not local to the router?

a)

192.168.0.3

b)

192.168.1.8

c)

192.168.0.4

d)

192.168.1.20





show ip route

Codes: C
-

connected, S
-

static, I
-

IGRP, R
-

RIP, M
-

mo
bile, B
-

BGP


D
-

EIGRP, EX
-

EIGRP external, O
-

OSPF, IA
-

OSPF inter area


N1
-

OSPF NSSA external type 1, N2
-

OSPF NSSA external type 2


E1
-

OSPF external type 1, E2
-

OSPF external type 2, E
-

EGP


i
-

IS
-
IS, L1
-

IS
-
IS leve
l
-
1, L2
-

IS
-
IS level
-
2, *
-

candidate default


U
-

per
-
user static route, o
-

ODR


Gateway of last resort is not set



192.168.0.0/32 is subnetted, 5 subnets

C 192.168.0.1 is directly connected, Loopback0

O 192.168.0.2 [110/11] via 1
92.168.1.5, 00:05:10, Ethernet1

O 192.168.0.3 [110/21] via 192.168.1.5, 00:05:10, Ethernet1

O 192.168.0.4 [110/31] via 192.168.1.5, 00:05:10, Ethernet1

O 192.168.0.5 [110/21] via 192.168.1.26, 00:05:10, Ethernet0

O 192.168.0.6 [110/
11] via 192.168.1.26, 00:05:10, Ethernet0


192.168.1.0/30 is subnetted, 6 subnets

O 192.168.1.8 [110/30] via 192.168.1.5, 00:05:10, Ethernet1

O 192.168.1.12 [110/30] via 192.168.1.26, 00:05:10, Ethernet0

C 192.168.1.4 is directly conn
ected, Ethernet1

C 192.168.1.24 is directly connected, Ethernet0

O 192.168.1.16 [110/20] via 192.168.1.26, 00:05:10, Ethernet0

O 192.168.1.20 [110/20] via 192.168.1.5, 00:05:10, Ethernet1


47)

What IP address is the furthest based on cost fro
m the router with this routing
table?

a)

192.168.1.16

b)

192.168.1.12

c)

192.168.0.4

d)

192.168.1.4


48)

The IP address 192.168.1.26 is:

a)

A local interface address

b)

A loopback address

c)

An OSPF neighbor

d)

Reachable via E1












traceroute 192.168.0.6


Type escape sequence

to abort.

Tracing the route to 192.168.0.6



1 192.168.1.22 0 msec


192.168.1.13 2 msec


192.168.1.22 1 msec


2 192.168.1.30 4 msec


192.168.1.17 4 msec


192.168.1.30 32 msec


49)

This traceroute shows that there are ____ equal path(s) to the de
stination.

a)

0

b)

1

c)

2

d)

3




show ip interface brief


Interface IP
-
Address OK? Method Status


Protocol

Ethernet0 192.168.1.25 YES manual up

up

Ethernet1 192.168.16.52 YES

manual up

up

Loopback0 192.168.0.173 YES manual up

down

Serial0 192.168.20.15 YES unset down


down

Serial1 unassigned YES unset administratively do
wn down

Serial2 192.168.25.12 YES unset administratively down down

Serial3 unassigned YES unset administratively down down

TokenRing0 unassigned YES unset administratively down down


50)

Which ro
ute is currently showing up as directly connected in the routing
table?

a)

192.168.20.15

b)

192.168.25.12

c)

192.168.0.173

d)

192.168.1.25