DeVry University
-
North Brunswick, N.J.
NCM 428_Y Enterprise Networking with TCP/IP
Test # 3 // 10.11.06
NAME: (Print) ________________________________Section: Y
1.
W
hat is the difference between a “message digest” and a “hash”?
2.
If you can find 2 messages having the same hash you have caused a
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3.
What is the advantage of signing the hash of a long message over signing
the message directly?
4.
If the hash output of the SHA
-
1 hash function were totally random the
number of zeros in it would be
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.
5.
Two characteristics of any strong hash function are:
[Be very clear!]
6. The “O” in OSPF stands for OPEN. What does that mean?
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.
7. LSAs type 3 are used for 2 purposes, these are:
a.
b.
8. A
totally
stubby
network is charecterised by the f
ollowing:
9. How can a router in an OSPF domain declare itself as a candidate to the BDR
position?
10. The DR (OSPF domain) functions as follows:
a.
b.
11. In O
SPF context, neighbors that achieve adjacency are allowed to
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12. A router within area that is
not
the core is known as “
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router”
13. OSPF LSA type 5 are flooded throughout the
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.
14. External networks are advertised inside an OSPF domain as type2 by default.
What does that mean?
15. In cofiguring an OSPF
–
speaking router one way to specify the
router’s ID is to use the highest configured IP address. What happens if this
interface goes down?
16. EIGRP supports the deployment of VLSM. Break the IP address 200.200.128.0/17
into two /2
1 addresses, four /26 addresses, and six /30 addresses [30 points].
17. EIGRP has a very fast convergence rate due to several factors, 4 of them are:
a)
b)
c)
d)
18. What is the implication (EIGRP) if t
he cost via a feasible successor candidate is less
than the feasible distance?
19. EIGRP is Cisco’s answer to
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protocol.
20. Auto summary
is on by default in EIGRP
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T/F.
21. In EIGRP context, the “feasible successor” refers to
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22. The metric values for all interfaces in Figure [Q
-
22], are:
Router
Interface
BW(k)
DLY(usec)
A
E0
10000
1000
F0
100000
100
T0
16000
630
S0
512
20000
S1
1544
20000
B
T0
16000
630
S0
1544
20000
C
E0
10000
1000
S0
1544
20000
D
E0
10000
1000
F0
100000
100
S0
1544
20000
E
E0
10000
1000
S0
1544
2
0000
F
F0
100000
100
S0
512
20000
E1
10000
1000
G
E0
10000
1000
E1
10000
1000
F0
100000
100
S0
1544
20000
Assuming EIGRP environment:
you MUST show your work FULLY otherwise
you get No credit!!!!
{20 points}*
What is the cost for a packet
at router D to reach subnet #20 via router G?
23. An entry in a routing table starts with the designation
“D” which indicates that this very route has been installed due to
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advertisement.
24. The “ip summary
-
address….” command in EIGRP is applied under an
interface. The purpose of this command is as follows:
Enter the password to open this PDF file:
File name:
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File size:
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Title:
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Author:
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Subject:
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Keywords:
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Creation Date:
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Modification Date:
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Creator:
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PDF Producer:
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PDF Version:
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Page Count:
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