Questions and answers for exam Preparation

MCQs

Total Questions : 885 | Page 22 of 89 pages

Question 211. How many hosts are attached to each of the local area networks at your site?

None of these
64
128
254
256

Discuss Question

Answer: Option D. -> 254

Question 212. The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

None of these
can receive and send data simultaneously
can send or receive data one at a time
can do one way data transmission only
cannot talk at once

Discuss Question

Answer: Option B. -> can receive and send data simultaneously

Question 213. Your company has a LAN in its downtown office and has now set up a LAN in the manufacturing plant in the suburbs. To enable everyone to share data and resources between the two LANs, what type of device(s) are needed to connect them? Choose the most correct answer.

Router
None of these
Modem
Hub
Cable

Discuss Question

Answer: Option A. -> Router

Question 214. The Internet Control Message Protocol (ICMP)

allows gateways to send error a control messages to other gateways or hosts
provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
All of these
None of these
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem

Discuss Question

Answer: Option C. -> All of these

Question 215. Contention is

the condition when two or more stations attempt to use the same channel at the same time
None of these
a continuous frequency capable of being modulated or impressed with a second signal
One or more conductors that serve as a common connection for a related group of devices
a collection of interconnected functional units that provides a data communications service among stations attached to the network

Discuss Question

Answer: Option A. -> the condition when two or more stations attempt to use the same channel at the same time

Question 216. When you ping the loopback address, a packet is sent where?

None of these
On the network
through the loopback dongle
Across the wire
Down through the layers of the IP architecture and then up the layers again

Discuss Question

Answer: Option E. -> Down through the layers of the IP architecture and then up the layers again

Question 217. Avalanche photodiode receivers can detect hits of transmitted data by receiving

400 photons
300 photons
200 photons
100 photons
None of these

Discuss Question

Answer: Option C. -> 200 photons

Question 218. Which of the following technique is used for fragment?

All of these
a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame
one of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
a technique used in best-effort delivery systems to avoid endlessly looping packets
None of these

Discuss Question

Answer: Option C. -> one of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size

Question 219. Satellite-Switched Time-Division Multiple Access (SS/TDMA) is

the method of determining which device has access to the transmission medium at any time.
None of these
a medium access control technique for multiple access transmission media
a form of TDMA in which circuit switching is used to dynamically change the channel assignments
All of these

Discuss Question

Answer: Option D. -> a form of TDMA in which circuit switching is used to dynamically change the channel assignments

Question 220. Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another?