CS601- Data Communication Assignment No. 02 SEMESTER Fall November 2011

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Solution
Question 1: [5]
Following figure is the Manchester encoding of a data stream. What is the binary
data?
Stream of this?
Binary Bit Stream is: 1010100101011010
Question 2: [5]
What is the main role of MAC address and IP address in computer networks?
Mac Address:
A Media Access Control address (MAC address) is a unique identifier assigned to
network interfaces for
Communications on the physical network segment. MAC addresses are used for
numerous network
Technologies and most IEEE 802 network technologies including Ethernet.
Logically, MAC addresses are
used in the Media Access Control protocol sub-layer of the OSI reference model.
IP Address:
An Internet Protocol address (IP address) is a numerical label assigned to each
device (e.g., computer,
printer) participating in a computer network that uses the Internet Protocol for
communication. An IP
address serves two principal functions: host or network interface identification
and location addressing.
Its role has been characterized as follows: "A name indicates what we seek. An
address indicates where
it is. A route indicates how to get there.
Question 3:[5]
Match the following to one of the five layers.
a. Communicates directly with users application program >> Application layer
b. Error correction and retransmission >> Transport Layer
c. Mechanical, Electrical and functional interface >> Physical Layer
d. Responsibility for delivery between adjacent nodes >> data link
e. Reassembly of data packets >>Transport Layer