Computer Network Test Set1

Computer Network Test Set1

Q1➡ |
You are working with a network that is 172.16.0.0 and would like to support 600 hosts per subnet. What subnet mask should you use?
i ➥ 255.255.192.0
ii ➥ 255.255.224.0
iii ➥ 255.255.252.0
iv ➥ None of the options

Q2➡ |
In the congestion avoidance algorithm, the size of the congestion window increases ___________ until congestion is detected.
i ➥ Suddenly
ii ➥ Multiplicatively
iii ➥ Exponentially
iv ➥ Additively

Q3➡ |
Using ‘RSA’ public key cryptosystem, if p=3, q=11 and d=7, find the value of e and encrypt the number ’19’
i ➥ 20,19
ii ➥ 33,11
iii ➥ 77,28
iv ➥ 3,28

Q4➡ |
Three-way handshake is used for
i ➥ Reliable establishment of a connection in the Internet transport layer
ii ➥ Exchange of packets at data link layer
iii ➥ Dropping a TCP connection
iv ➥ Multiplexing between three hosts on the same LAN

Q5➡ |
A student is browsing the website wvw.youhoo.co.in She clicks on a URL which is from the same website. Which of the following is a more accurate description of the sequence of events that takes place after the click event
I. 3-way TCP handshake event between client and server
II. HTTP get request event
IIL DNS query and response event
i ➥ I, II, III
ii ➥ III, II, I
iii ➥ III, I, II
iv ➥ None of these

Weekly Test GATE/NTA NET CSA

6 thoughts on “Computer Network Test Set1”

  1. Avatar

    Answer-
    1. (iii)
    Host ID = ⌈log2 600⌉= 10
    subnet mask: 11111111. 11111111. 11111100.00000000
    subnet mask: 255. 255.252.0

    2. (iv)Additively

    3. (iv) n = p*q.= 3*11= 33
    Phi(n) = (p-1)*(q-1) = 2*10=20
    e*d mod phi(n) ==1
    e*7 mod 20===1
    Then e= 3
    CT = (PT ki power e) Mod n
    = 19³mod 33
    = 28

    4.(i) Reliable establishment of a connection in the Internet transport layer

    5.(ii) III, II, I

  2. Avatar

    Ans 1 – 255.255.252.0
    Ans 2 – Additivity
    Ans 3 – 3,28
    Ans 4 – Exchange of packets at data link layer
    Ans 5 – 1,2,3

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