Q. Match the following:

(a) Line coding                         (i) A technique to change analog signal to digital data.
(b) Block coding                       (ii) Provides synchronization without increasing
number of bits
(c) Scrambling                          (iii) Process of converting digital data to digital signal.
(d) Pulse code modulation    (iv) Provides redundancy to ensure synchronization
and inherits error detection.

Codes:
      (a)   (b)   (c)   (d)

View solution

Q. Assume that we need to download text documents at the rate of 100 pages per minute. A page is an average of 24 lines with 80 characters in each line and each character requires 8 bits. Then the required bit rate of the channel is ................

View solution

Q. Suppose that the time to do a null remote procedure call (RPC) (i.e, 0 data bytes) is 1.0 msec, with an additional 1.5 msec for every 1K of data. How long does it take to read 32 K from the file server as 32 1K RPCs?

View solution

Q. Which of the following services is not provided by wireless access point in 802.11 WLAN?

View solution

Q. Which of the following fields in IPv4 datagram is not related to fragmentation?

View solution

Q. Four channels are multiplexed using TDM. If each channel sends 100 bytes/second and we multiplex 1 byte per channel, then the bit rate for the link is ...............

View solution

Q. In a typical mobile phone system with hexagonal cells, it is forbidden to reuse a frequency band in adjacent cells. If 840 frequencies are available, how many can be used in a given cell?

View solution

Q. Using p=3, q=13, d=7 and e=3 in the RSA algorithm, what is the value of ciphertext for a plain text 5?

View solution

Q. Which of the following is not a congestion policy at network layer?

View solution

Q. The combination of an IP address and a port number is known as ...................

View solution

Q. A network with bandwidth of 10 Mbps can pass only an average of 15,000 frames per minute with each frame carrying an average of 8,000 bits. What is the throughput of this network ?

View solution

Q. Consider a subnet with 720 routers. If a three-level hierarchy is choosen with eight clusters, each containing 9 regions of 10 routers, then total number of entries in the routing table is ...................

View solution

Q. In a classful addressing, the IP addresses with 0 (zero) as network number:

View solution

Q. In electronic mail, which of the following protocols allows the transfer of multimedia messages?

View solution

Q. A device is sending out data at the rate of 2000 bps. How long does it take to send a file of 1,00,000 characters ?

View solution

Q. Infrared signals can be used for short range communication in a closed area using ................... propagation.

View solution

Q. A bridge has access to ............... address in the same network.

View solution

Q. The minimum frame length for 10 Mbps Ethernet is ............. bytes and maximum is ................ bytes.

View solution

Q. The bit rate of a signal is 3000 bps. If each signal unit carries 6 bits, the baud rate of the signal is ...............

View solution

Q. Match the following:

List – I                                    List - II
a. Physical Layer                     i. Allow resources to network access
b. Datalink Layer                     ii. Move packets from one destination to other
c. Network Layer                      iii. Process to process message delivery
d. Transport Layer                   iv. Transmission of bit stream
e. Application Layer                v. Formation of frames

Codes:
      a   b   c    d   e

View solution