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Total Questions : 885 | Page 21 of 89 pages
Question 201. A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?
  1.    delta routing
  2.    static routing
  3.    flooding
  4.    None of these
  5.    hot potato routing
 Discuss Question
Answer: Option E. -> hot potato routing
Question 202. How many digits of the DNIC (Data Network Identification Code) identify the country?
  1.    first six
  2.    first four
  3.    first five
  4.    first three
  5.    None of these
 Discuss Question
Answer: Option D. -> first three
Question 203. The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to
  1.    0.999
  2.    0.003
  3.    0.009
  4.    None of these
  5.    0.991
 Discuss Question
Answer: Option C. -> 0.009
Question 204. Frames from one LAN can be transmitted to another LAN via the device
  1.    Repeater
  2.    Bridge
  3.    Router
  4.    None of these
  5.    Modem
 Discuss Question
Answer: Option B. -> Bridge
Question 205. What is the default subnet mask for a class C network?
  1.    255.255.0.0
  2.    255.0.0.0
  3.    None of these
  4.    255.255.255.0
  5.    127.0.0.1
 Discuss Question
Answer: Option D. -> 255.255.255.0
Question 206. Which of the following is used for modulation and demodulation?
  1.    modem
  2.    gateway
  3.    multiplexer
  4.    protocols
  5.    None of these
 Discuss Question
Answer: Option A. -> modem
Question 207. What are the most commonly used transmission speeds in BPS used in data communication?
  1.    2400
  2.    None of these
  3.    300
  4.    9600
  5.    1200
 Discuss Question
Answer: Option D. -> 9600
Question 208. Which of the following condition is used to transmit two packets over a medium at the same time?
  1.    Synchronous
  2.    Collision
  3.    None of these
  4.    Contention
  5.    Asynchronous
 Discuss Question
Answer: Option B. -> Collision
Question 209. You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign?
  1.    255.255.255.255
  2.    255.248.0.0
  3.    255.240.0.0
  4.    255.254.0.0
  5.    255.252.0.0
 Discuss Question
Answer: Option D. -> 255.254.0.0
Question 210. Which of the following is not a disadvantage of wireless LAN?
  1.    higher error rate
  2.    interference of transmissions from different computers
  3.    Slower data transmission
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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