Institute of Technology Carlow

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Oct 29, 2013 (3 years and 7 months ago)

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Institute of Technology Carlow

Department of
Computing & Networking

Autumn 2011

Examinations


Programme Code

CW_KCCNO_C

Programme Title

Higher Certificate in Science in
Computer Networking & Optical
Communications

Year

2

Subject Title

Network Routing & Switching

Date


Duration

3 hours


Examiners

Mr P Hickey


Mr A McDonald





Special Requirements
:




Instructions to Candidates:

1

Write your Name, Course, Course

Year and Class Group on your answer book.

2

Answer any
THREE

questions. Marks as indicated in brackets.

3

All questions carry equal marks.





Question 1.

(a)

Explain the difference between static & dynamic routes.

(10 marks)


(b)

Describe a typical router
startup sequence.

(10 marks)


(c)

Router memory consists of RAM, NVRAM, Flash & ROM. Briefly describe the contents &
function of each.

(10 marks)


(d)

When a router boots up, it loads its IOS from three possible areas. Explain.


(10 marks)

Question 2.

(a)

What is the
difference between routed & routing protocols?

(10 marks)


(b)

What is the difference between interior & exterior routing protocols?

(10 marks)


(c)

Which of the following are distance vector routing protocols & which are link state routing
protocols? RIP, EIGRP,
OSPF

(10 marks)


(d)

Describe the use of telnet, ping & traceroute in router testing.

(10 marks)


Question 3.

(a)

Explain how EIGRP is a more sophisticated routing protocol than RIP


(10 marks)

(b)

Describe the advantages & disadvantages of link state routing.

(10
marks)


(c)

In EIGRP, explain the following terms: successor, feasible successor, DUAL, route
summarization

(10 marks)


(d)

What is the purpose of VLSM? What is the VLSM equivalent of 255.255.255.240?

(10 marks)




Question 4.

(a)

On which ISO layer do switches operate
? How do switches handle collision domains &
broadcast domains?

(10 marks)


(b)

How do VLANs improve the operation of switches? Describe one method of handling inter
-
VLAN traffic.

(10 marks)


(c)

In network design, explain the following terms: HCC, VCC.

(10 marks)


(d)

In the hierarchical design model, what is the distribution layer used for?



(10 marks)

Question 5.


(a)

In networks, how is fault tolerance best achieved?

(10 marks)


(b)

Briefly describe the steps involved in STP convergence.

(10 marks)


(c)

One type of VLAN is
MAC address
-
based. Briefly describe two other types of VLAN.

(10
marks)


(d)

Explain the difference between geographical & campus
-
wide VLANs?



(10 marks)