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CUSTOMER_CODE
SMUDE
DIVISION_CODE
SMUDE
EVENT_CODE
APR2016
ASSESSMENT_CODE BC0055_APR2016
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
4259
QUESTION_TEXT
Discuss & Explain BOOTP
The BOOTP enables _______ process
SCHEME OF EVALUATION Introduction – (6 Marks)
BOOTP process- (4 Marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
4260
QUESTION_TEXT
Explain the different TCP congestion control algorithms
● Slow start
● Congestion avoidance
SCHEME OF EVALUATION ● Fast retransmit
● Fast recovery
Explanation of each carries (2.5 Marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
72410
QUESTION_TEXT
List the steps to be carried out to reuse previously allocated network
address by client.
SCHEME OF
EVALUATION
The steps are:
1. The DHCPREQUEST message is broadcasted by the client in the
local subnet. The DHCPREQUEST message will have the network address
of the client.
2. A server sends a DHCPACK message to the client with configuration
parameters and at the same time renewing the lease.
3. The server sends a DHCPNACK to the client if the lease time
expired.
4. When a client gets DHCPACK message with configuration
parameters, it records the lease time and the lease identification cookie
listed in the DHCPACK message. Now the client is configured and resets
the timers LT1 and LT2.
5. When the DHCPACK message problem noticed (for example,
address is already in use), a DHCPDECLINE message is sent by the client
to the server and the configuration process restarted by requesting a
new network address. If a DHCPNAK message is received by the client, it
cannot reuse the remembered address. The client must restart its
configuration process to allocate a new network address.
(Each step carries 2 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
72411
QUESTION_TEXT
What are the different states present in TCP connection?
The states are:
● LISTEN
● SYN-SENT
● SYN-RECIEVED
● ESTABLISHED
● FIN-WAIT-1
SCHEME OF EVALUATION
● FIN-WAIT-2
● CLOSE-WAIT
● CLOSING
● LAST-ACK
● TIME-WAIT
● CLOSED
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
121862
QUESTION_TEXT
What is a socket? Give an example.
SCHEME OF
EVALUATION
The socket interface is one of serval application programming interfaces
to the communication protocols. Designed to be a generic
communication programming interface, socket APIs were first
introduced by Berkeley software Distribution (BSD). Although it has not
been standardized, Berkeley socket API has become a de facto industry
standard abstraction for network TCP/IP socket implementation.
Consider the following terminologies:
1.
A socket is a special type of file handle, which is used by a process
to request network services from the operating system
2.
A socket address is the triple: <protocol, local–address, local port>
For example, in the TCP/IP I(version 4)suite:
<tcp, 192.168.14.234, 8080>
3.
A conversation is the communication link between two processes.
4.
An association is the 5–tuple that completely specifies the two
processes that comprise a connection:
<protocol, local–address, local–port, foreign–address, foreign–port>
In the TCP/IP (version 4) suite, the following could be a valid
association.
<tcp, 192.168.14.234, 1500, 192.168.44, 22>
5.
A half–association is either one of the following, which each
specify half of a connection:
<protocol, local–address, local–process>
Or:
<protocol, foreign–address, foreign–process>
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
121863
Explain the different categories of DHCP message Types
QUESTION_TEXT
DHCP messages fall into one of the following categories:
1.
DHCPDISCOVER:
2.
DHCPOFFER
3.
DHCPREQUEST
4.
DHCPACK
5.
DHCPNACK
6.
DHCPDECLINE
7.
DHCPRELEASE
8.
DHCPINFORM
SCHEME OF EVALUATION