Computer Networking Interview Guide - Set 13 - ObjectiveBooks

Computer Networking Interview Guide - Set 13

Practice Test: Question Set - 13

1. With an IP address of, what is your default subnet mask?

2. A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?
    (A) Hot potato routing
    (B) Flooding
    (C) Static routing
    (D) Delta routing

3. Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what is the mean number of transmissions required to send a frame if acknowledgements are never lost.
    (A) P I (K + 1)
    (B) KIK (1 + F)
    (C) 1/ (1 - F)
    (D) K I (K - P)

4. A modem is connected in between a telephone line and a
    (A) Network
    (B) Computer
    (C) Communication adapter
    (D) Serial port

5. What are the most commonly used transmission speeds in BPS used in data communication?
    (A) 300
    (B) 1200
    (C) 2400
    (D) 9600

6. Which of the following network access standard is used for connecting stations to a packet-switched network?
    (A) X.3
    (B) X.21
    (C) X.25
    (D) X.75

7. ASK, PSK, FSK, and QAM are examples of _______ encoding.
    (A) Digital-to-digital 
    (B) Digital-to-analog
    (C) Analog-to-analog
    (D) Analog-to-digital

8. 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.
    (A) Modem
    (B) Cable
    (C) Hub
    (D) Router

9. Which of the following statement is correct?
    (A) A spin stabilized satellite used solar cells mounted on a cylinder body that continuously rotates so that 40 a time and it also uses gyroscopic action of a spinning satellite to maintain its orientation towards the earth and the sun.
    (B) A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun
    (C) Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations.
    (D) Satellite transponders use a single frequency for reception and transmission from one point on earth to another.

10. Communication circuits that transmit data in both directions but not at the same time are operating in
    (A) A simplex mode
    (B) A half-duplex mode
    (C) A full-duplex mode
    (D) An asynchronous mode

11. When you ping the loopback address, a packet is sent where?
    (A) On the network
    (B) Down through the layers of the IP architecture and then up the layers again
    (C) Across the wire
    (D) Through the loopback dongle

12. You are working with a network that has the network ID, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

13. Which of the following communications modes support two-way traffic but in only one direction of a time?
    (A) Simplex 
    (B) Half-duplex
    (C) Three-quarters duplex
    (D) None of the above

14. ICMP (Internet Control Message Protocol) is
    (A) A TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
    (B) A TCP/IP high level protocol for transferring files from one machine to another
    (C) A protocol used to monitor computers
    (D) A protocol that handles error and control messages

15. If communication software can be called the "traffic cop" of a micro communication system, then what should the modem be called?
    (A) Park
    (B) Bridge
    (C) Interface
    (D) Link

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