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Exam of 125 pages for the course cos2626 exam pack at University of South Africa (cos2626 exampack)
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COS2626 EXAMPACK[Document subtitle]
[DATE]
[COMPANY NAME]
[Company address]
,NB PLEASE COMPLETE THE ATTENDANCE REGISTER ON THE BACK PAGE, TEAR OFF AND HAND TO THE INVIGILATOR
4 This page/paper rs the property of the University and under no circumstances may the candidate retain rt or take rt out of the exarrnnanon
venue
A candidate who without authorisation takes mto the exarnmatron venue any book, document or object which could assist hun m the
exarrnnanon and does not hand over such material to the 1nv1gtlator before the official commencement of the examination wall oe guilty of
anfnngmg the Uruversny s exarrunauon regulations and wall be liable to punishment as determined by Council
2 Rough work may be done only on the examination question paper and must be labelled as such
3 No notes may be made on any part of the body, such as the hands or on ,my garment
- - ·.- - -- - Marks - .
Que,tion No . . . - - .. -Exa"!iners -. - . - . -1 . -:-~2 . - j- . - - - - - . .;:_
Section A
Section B
1
2
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4
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• Total· -
WARNING
Examination centre
Date of exammatron
Number of paper
subject
FOR_USE_BY EXAMINATION INVIGILATOR
IIII
IDENTITY NUMBER
STUDENT NUMBER
COMPUTER NETWORKS I
COS2626
MAY/JUNE 2018
SECOND PAPER
urnve*"stty
of south afnca UNlSA
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1 This paper consists of 2 sections compnsmg 40 marks each The final mark rs converted
to a total out of a 1 00
2 The mulnple-choice section (SECTION A) must be answered on the grid provided on
page 17 Each correct answer will be awarded 1 mark
3 The wntten section (SECTION B) must be answered m the blocks provided below the
questions The marks that are awarded for each question are indicated m brackets next
to the question number
INSTRUCTIONS:
,Please complete the attendance register on the back page, tear off and hand to the
invigilator.
This paper consists of 24 pages
--- --- --- -- - -- ---- --- --- ---- -
\
This examination question paper remains the property of the University of South Africa and may not be
removed from the exarmnanen venue
Closed book exammatron
MS H ABDULLAH
MRMJ MABOE
EXAMINERS
FIRST
SECOND
Duration 2 Hours 80 Marks
Computer Networks I
COS2626 May/June 2018
SECOND PAPER
UNlSAI=::
UNIVERSITY EXAMINATIONS UNIVERSITEITSEKSAMENS
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[TURN OVER]
For conversational voice, VoIP (Voice over IP), applications such as Skype and Google Talk,
use a model, whereas m streaming stored audio and video such as
watching a video on YouTube, a model rs used
a broadcast, chent-server
b client-server, pomt-to-pomt
c pomt-to-pomt, chent-server
d multicast, broadcast
Question 2
a only I
b only iv
c 1, 11 and 111
d only II and 111
The primary protocol used by Web servers and browsers (clients) is HTIP (Hypertext
Transfer Protocol)
II Ine-mail services, the reciprent's mail server delivers the message to the recervmq
clJent using one of two protocols POP3 (Post Office Protocol, version 3) or IMAP
(Internet Message Access Protocol, version 4) Using \MAP4, the email 1s downloaded
to the chent computer, Using POP3, the client apphcatron manages the email stored on
the server
111 FTP (File Transfer Protocol) rs a client-server application that transfers flies between
two computers, pnmanly using FTP (File Transfer Protocol) FTP uses encryption and
rs therefore extremely secure
rv A remote apphcanon is an apphcanon that rs installed and executed on a server and rs
presented to a user working at a client computer
Which one of the following statements regarding client-server apphcatrons used on networks
and the Internet rs (are) FALSE?
Question 1
Introduction to Networking
, SECTION A: MULTIPLE-CHOICE QUESTIONS 40 MARKS
ANSWER THIS SECTION IN THE GRID PROVIDED ON PAGE 20
COS2626
May/June 2018
2
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[TURN OVER]
What are the last two parts of a host name known as?
a Top level domain
b FQDN (Fully Qualified Domain Name)
c Domain name
d Host qualifier
Question 5
How Computers Find Each Other on Networks
(iv) network
(rv) transport
(rv) presentation
(iv) presentation
(111) session,
(111) presentation,
(111) session,
(111) transport,
(11) physical,
(11) physical,
(11) network,
(11) physical,
(1) presentation,
(1) session,
(1) physical,
(1) network,
a
b
c
d
I Descnbes how data between applications rs synced and recovered 1f messages don't
arrive intact at the receivmq apphcanon
II Responsible for sending bits via s wired or wireless transrrussion
Ill Responsible for reformatting, compression and/or encrypting data m a way that the
appacanon on the receivmq end can read
IV Responsible for transporting Apphcanon layer payloads from one apphcanon to
another
The layers of the OSI (Open Systems Interconnection) model which are responsible for the
functions, labelled A to D respectively m the following table, are
Question 4
a only I
b only I and II
c only II
d only u and III
ease of configuration
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