question for ugc net

1. 19. The maximum size of the data that the application layer can pass on to the TCP layer below is
(b) 2^ 16 bytes
4 TO' header length 1NET dun. 20171
(a) 21" bytes ikerg` bytes— TCP header length (d) 2" bytes
20. A packet whose destinationis outside the local Tc PAP network segment is sent to (NET Jan.
20171 (a) File server (b) DNS server (c)DHCP server ('Default gateway 21. Which o 1' the
following layer of0S1 reference model is also called end-to-end layer? I N ET Nov. 20171 (a)
Network layer (h) Datalink layer (c) Session layer ocirtransport layer 1NET Nov. 20171
21. Match the following List-I List-II (A) Data link layer (I) encryption (B) Network layene (II)
conction control (C) Transport layer (III) routing (D) Presentation layer (I V) framing
Codes: A 13 (a) IV III I (b) Ill IV II (c) IV 11 III idre IV III II

2. • 23. Consider the following two suaernenk, : SI: TCP handles
both congest ion and flow control. S2: UDP handles
congestion but not tlow control.
• 1NET Dee. 20181
• Which of the following options is correct with respect to
the above statements (SI ) and (521? (a) Both SI and S2 are
correct (h) Neither SI nor S2 is correct 1JerS1 is correct but
S2 is riot correct (d) S I is not correct but 52 is correct 24.
Consider ISO-OSI network architecture reference model.
Session layer of this model oilers dialog control, token
management and as services. 1NET Dec. 20181 (a)
Asyncmnization L,(hrtncrunriation (c) Errors (d) Flow
control

3. • f ANSWER KEY 1. (a) 2. (a) 3. (a) 4. (c) 5. (c) 6.
(c) 7. (a) 8. (a) 9. (b) 10. (c) 11. (c) 12. (a) 13.
(a) 144d) 15. (c) 16. (c) 17. (d) 18. (a) 19. (c)
20. (d) 21. (d) 22. (d) 23. (c) 24. (b)

4. •
• ‘.0
• ( WIPE-TER NETWORKS
• CD
• UGC-NET Previous Years' Questions
• NETWORK MODELS & BASIC CONCEI9
• I. Both hosts and routers arc TCP/1P protocol software. However. router: do not use protocol from
alllaydt The layer for which protocol sulksan: is not needed by a muter is 1NETJune 2012) Layer-
5(Application) (b) Layer-I (Physical) (c) Layer -3 (Internet) (d) Layer-2 (Network Interface) 2. Which of
the following TCP/1P Internet protocol is disklims machine uss. to obtain its IP address from a
server? IN ET June 20121 i...(1)-11ARP (b) RIP (c) ARP (d) X.25 3. The design issue of Datalink Layer
in OSI Reference Model is ,....(di Framing (h) Representation of bits (c)Synchronizatkm of bits (d)
Comection control 4. Decryption and encnpt ion of data are the rinponsibilityofwhich °Mc following
layer? (a)Biysical layer (b) Data Link layer INET June 20121 ,..(4-Presentation layer (d) Session layer
5. Which layer °IDS' reference model uses the ICMP (Internet Control Message Protocol)? (a)
Transport layer (h) Data link layer INET.Itme 20121 joilictwork layer (d)Application layer 6. Match
the 1'01kmbig : List - 1 . List - II A. Application layer - -11. TCP B. Transport layer 2. IIDL(' C. Network
layer 1—Th 3. !DTP D. Data link layer--J 1 -- 4. BC; P Codes : A (a) 2 3 (c) 3
• 2 B C A 1 4 (b) 3 I 4 (d) 2

5. • 7. Data Encryption Techniques are particularly dart used for
%Siprotecting Data in Data Communication System (b) reduce
Storage space requirement (c) enhances Data Integrity (d)
decreases Data Integrity
• 13 C 4 1 2 4 1 3
• INET Dee. 21)121
• IN ET Dee. 20121
• 8. Ina fully connected mesh network with n devices, them are
physical chonnels to link all devices. 1111 (D)Applicaiion layer
(C)Transport layer (B) Network layerrt (A) Data link layer---
• LAO n(n-IY2 (b)n(n+1)12 (c) 2n 9. Match the following:
• (d) 2n+1 INET June 20131 1NET June 20131
• (i) Flow control _)(ii) Node to node delivery (iii) Mail services (iv)
Routing

6. • COMPUTER NETWORKS
• Codes:
• A B (a) iiiiv (c) ii
• C Iv
• mm N
• CO. IN ET Dec. 20131 (d) Encryption and decryption is the
responsibility of layer (a) Physical (b) Network ..(ar—mlication (c1)
Datalink 11. Which layer °fog reference model is responsibk for
decomposition of messages and generation of sat uence 1NET Dec.
20131 numbers to ensure correct re-composition from end to end
of the network? (a) Physical (b) Data link ponsport (d)Application
12. Match the following: List - I A. Physical layer B. Datalink layer C.
Network layer D. Transport layer E Application Codes:
•