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Network Systems Administration Question Paper
Network Systems Administration
Course:Bachelor Of Science In Information Technology
Institution: Masinde Muliro University Of Science And Technology question papers
Exam Year:2010
EXAMINATION FOR THE DEGREE OF BACHELOR
OF SCIENCE IN INFORMATION TECHNOLOGY
BIT 2205: NETWORK SYSTEMS ADMINISTRATION
DATE: DECEMBER 2010 TIME: 2 HOURS
INSTRUCTIONS: Answer question ONE and any other TWO questions
QUESTION ONE
a) Providing IP addresses to clients is the most fundamental task performed by a DHCP server. DHCP includes three different address allocation mechanisms to provide flexibility when assigning IP addresses. Describe briefly each of these three mechanisms. (3 Marks)
b) While troubleshooting a connectivity problem on the network, you issue the ping command from
your PC command prompt, but the output shows "request times out." Explain why this problem has to be associated with the OSI network layer. (3 Marks)
c) Although every large internetwork has unique features, all scalable networks have essential attributes in common. A scalable network has five key characteristics.Describe them. (5 Marks)
d) What are Access Control Lists (ACLs) used to do? (4 Marks)
e) You have been assigned the task of installing a NIC and ensuring that it operates properly.
(i) What should you disable when installing a new driver? (1 Mark)
(ii) What is a best practice to follow when installing a driver? (1 Mark)
(iii) Why should you reboot after installing a driver? (2 Marks)
(iv) What must all NICs be configured with in order to participate on the network?
(3 Marks)
f) Discuss in detail the three steps followed in establishing a network baseline. (6 Marks)
g) State two disadvantages of Network Address Translation (NAT). (2 Marks)
QUESTION TWO
a) Explain the following :
i. Storage Area Networks (SAN). (2 Marks)
ii. Virtual Private Network (VPN). (2 Marks)
iii. 10BASE5. (2 Marks)
iv. 10BASE-T (2 Marks)
b) There are three main methods for troubleshooting, namely Bottom-Up, Top-Down and Divide-and-Conquer. Discuss these troubleshooting methods. (6 Marks)
c) With the aid of a relevant command, explain briefly the function of nslookup (6 Marks)
QUESTION THREE
a) Explain the following terminologies as used in the TCP three-way handshake:
i. Positive acknowledgment and retransmission (PAR) (2 Marks)
ii.Windowing. (2 Marks)
iii. Sequencing (2 Marks)
b) The management of data as it flows through the network is also a role of the intermediary devices.
These devices use the destination host address, in conjunction with information about the network interconnections, to determine the path that messages should take through the network. State five functions performed by the processes running on the intermediary network devices. (5 Marks)
c) To visualize the interaction between various protocols, it is common to use a layered model. A layered model depicts the operation of the protocols occurring within each layer, as well as the interaction with the layers above and below it. State the benefits to using a layered model to describe network protocols and operations. (4 Marks)
d) Describe the half-duplex (CSMA/CD) access method. (5 Marks)
QUESTION FOUR
a) The TCP/IP model describes the functionality of the protocols that make up the TCP/IP protocol suite. These protocols, which are implemented on both the sending and receiving hosts, interact to provide end-to-end delivery of applications over a network. Describe the steps involved in a complete communication process. (7 Marks)
b) State four benefits of VLANs (4 Marks)
c) You are a systems administrator and you are about to assign static IP addresses to various servers on your network. For the network 192.168.20.24/29 the router is assigned to the first usable host address, while the last usable host address goes to your Sales server. Which address would you use for the router, the Sales server and the subnet broadcast? (6 Marks)
d) What factors would you take into account when choosing between a layer 3 switch and a router?
(3 Marks)
QUESTION FIVE
a) KCA University Ruaraka campus has considered creating a network for the new tuition complex that has just been completed. The building is composed of five floors including the ground floor.
You have been tasked to be the designer of this network which will later be connected to the rest of the KCAU network. It is assumed that you will base your design on Ethernet and all the floors will be cabled. It is further assumed that each floor will have approximately 150 computers. On each floor, there will be administrative computers which must be separated from the student computers.
i.What is the minimum number of wiring closets you would create for this particular
network? (1 Mark)
ii.Where would you place your MDF and why? (2 Marks)
iii.What would be the minimum number of 24-port switches you will use for this network?
(2 Marks)
b) Assuming that the average UTP cable run for each computer is 40 metres. How many reels of UTP cable would you require for wiring the whole building? Show your working. (N.B. It is assumed that as a networking professional you know the length of one reel of UTP cable. Round the reel length to the nearest 10 metres.) (4 Marks)
c) Explain why putting the faculty computers in a separate VLAN could protect faculty network traffic
from student connections. (5 Marks)
d) Describe the steps you would follow when designing or modifying the KCAU WAN. (6 Marks)
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