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OF SCIENCE enD TECHNOLOGY

FACULTY OF COMPUTING AND INFORMATICS

DEPARTMENT OF COMPUTER SCIENCE

QUALIFICATION: BACHELOR OF COMPUTER SCIENCE

QUALIFICATION CODE: 07BACS LEVEL: 7

COURSE: INTERNET AND INTRANET SYSTEMS ADMINISTRATION COURSE CODE: ”57118

DATE: JULY 2017 SESSION: 2

DURATION: 2HOURS MARKS: 50

SUPPLEMENTARY / SECOND OPPORTUNITY EXAMINATION QUESTION PAPER

EXAMINER(S) . SHADRECK CHITAURO

MODERATOR;KUDAKWASHE MADZIMA

THIS QUESTION PAPER CONSISTS OF 4 PAGES

(Excluding this front page)

INSTRUCTIONS

Answer all questions in Section A and B.

Write all your answers in the answer booklet provided and number every question.

Please, ensure that your writing is legible, neat and presentable.

Marks/scores per question are given in square brackets [ ].P‘PP’N!‘ Do not use or bring into the examination venue books, programmable calculators, mobile

devices and other material that may provide you with unfair advantage. Should you be in

possession of one right now, draw the attention of the examination officer or invigilator.

6. All things that should not be marked, e.g. any ”rough work”, have to be crossed out

unambiguously.

SECTION A

True or False

(a) In Windows Server 2012 Web Server Service role and FTP service are added as different

roles. [1]

(b) The HTTP response code 200 is an example of success when accessing a website from a

webserver. [1]

(c) The command DCPROMO is no longer supported in Windows Server 2012. [1]

(d) LDAP listens on port 389 for regular communication. [1]

(e) C:\windows\NTDS is an Active directory database for Windows Server 2012. [1]

(f) When a client computer is set to boot using PXE (pre—boot execution environment) it will

send a broadcast packet in the network using UDP protocol. [1]

(g) When setting up a first domain controller in your network, the will be the default global

catalog server. [1]

(h) The default configuration file for apache webserver in CentOS is:

/etc/httpd/conf/httpd.conf [1]

(i) When configuring samba, workgroup parameter is the same as domain name used when

joining clients to the domain. [1]

(j) When configuring a proxy server, swap directories are created by squid -z command.

[1]

(k) A bank ATM network is an example of client/server application. [1]

(l) One of the benefits of a proxy server is that it can reduce bandwidth charges. [1]

SECTION B

2. There are three types of port numbers namely Well Known Ports, Registered Ports and

Dynamic or Private Ports. Which range is used by peer to peer applications? What will be the

advantage of changing default SMTP port from Well Known Ports range to Registered Ports

range? [3]

3. You are employed as the Systems Administrator for a certain Company. You have 3 Linux

servers running mail services, proxy services and file server services. Every Friday you need to do

a backup of the /home directory on the file server. The command to do the backup is:

tar -chvf mybackup.tar.gz [home

As the Systems Administrator you need to implement a cron job to do the backup every week

Friday at 23:00hrs every month from January to December. Give an example for a cron job to do

the backup, further more you can explain your cron job in few lines. [3]

4. A port scan was done in the network. The results for the port scan are shown in the diagram

below:

Port Protocol State .Servi ca

1 443 tcp closed https2 1 10 top filtered pops

3- 143 tcp open imap

4 22 tcp open ssh

5 995 tcp closed popSs6 993 top closed im aps

T 23 tcp closed telnet

8 53 udp open domain

(i) What do the states ”closed” and ”filtered” mean? [4]

(ii) What can you do to close port 53? [2]

5. Analyse the diagram below and answer questions which follows.

from Windows Server 2012 Web Server.

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(a) What is the name of the Web Server Service which comes with Windows Server 2012?

[Hint: The service is the one with the diagram shown above] [1]

(b) After uploading your website to your web server you discovered that when accessing the

website, it is not displaying your website homepage. Which tab allows you to set the

default home page and make it the first entry on the list? [2]

(c) You want to change the default document root directory of your website, which tab can

be used to achieve this? [2]

(d) Your Web Server is listening only to port 80 and you want it to accept requests through

port 443. Which option allows you to do this? [2]

(e) You discovered that your server can only allow a maximum of 50 concurrent users and

you need to increase this to 5000 concurrent users. Through which option can you achieve

this? [1]

(f) SSL is an acronym for? What will be the advantage of integrating your Web Server with

SSL? [3]

(g) Company D wants to host their website on the same server hosting your website so that

the two websites can be accessed from the same machine. Which option or tab can be

used to do this? [2]

6. You configured your DHCP server to assign IP addresses to three separate subnets or

subnetworks you discovered that the router you are using is no longer working. You want to

install Windows Server 2012 and configure it to work as a router. Which server role must be

installed before you can configure routing or any routing protocol(s)? [2]

7. (i) Matangara Holdings is experiencing problems with employees setting up lot of DHCP servers

within the network through virtual machines. You have been hired to solve this problem so that

only a legitimate DHCP server can allocate IP addresses to client. All DHCP servers set by

employees in their virtual machines must be blocked. How are you going to solve the problem?

[2]

(ii) Under what circumstances can one configure a DHCP server and make it work without

authorising it? [2]

8. You are an administrator for Company 2 and you are informed that CEO’s email client machine

is affected by a virus. This client machine was configured to use IMAP in its default state. Give

one disadvantage and two advantages of setting up IMAP in its default configurations. State the

port number used by IMAP. You can explain your answer to justify it. [5]

9. Give two advantages of integrating LDAP with your mail server [2]

***END OF QUESTION PAPER. GOOD LUCK

***