301. Data unit 111111, divisor 1010—CRC dividend sent before division is ________

Data Communication and Computer Networks • Error Detection • UGC NET Paper 2 Computer Science SEPT 2013

302. Size of network bits and host bits in Class A IP address?

Data Communication and Computer Networks • IP addressing • UGC NET Paper 2 Computer Science SEPT 2013

303. Bit rate of an 8-PSK signal with 2500 Hz bandwidth is ________

Data Communication and Computer Networks • Modulation • UGC NET Paper 2 Computer Science SEPT 2013

304. Match: (a) UDP (b) OSPF (c) SMTP (d) HDLC — (i) Message-Transfer Prot (ii) Bit-oriented Prot (iii) Interior Gateway Routing Prot (iv) Connectionless Transport Prot

Data Communication and Computer Networks • Protocol mapping • UGC NET Paper 2 Computer Science SEPT 2013

305. If A sends encrypted message to B, plaintext is encrypted with ________

Data Communication and Computer Networks • Public-Key Crypto • UGC NET Paper 2 Computer Science SEPT 2013

306. A ______ firewall forwards or blocks based on network & transport headers.

Data Communication and Computer Networks • Security • UGC NET Paper 2 Computer Science SEPT 2013

307. Given IP 201.14.78.65 mask 255.255.255.224, subnet address is ________

Data Communication and Computer Networks • Subnetting • UGC NET Paper 2 Computer Science SEPT 2013

308. Which TCP header field tells how many bytes may be sent starting at the acknowledged byte?

Data Communication and Computer Networks • Transport protocols • UGC NET Paper 2 Computer Science SEPT 2013

309. DES with 56-bit key has ___ distinct stages.

Data Communication and Computer Networks • Cryptography • UGC NET Paper 2 Computer Science SEPT 2013

310. In classful addressing, first four bits of a Class A IP are ___.

Data Communication and Computer Networks • IP addressing • UGC NET Paper 2 Computer Science SEPT 2013

311. Match: a.Call control→conn mgmt; b.A-bis→interface BTS-BSC; c.BSMAP→MSC-BSS; d.CDMA→spread spectrum.

Data Communication and Computer Networks • Mobile Protocols • UGC NET Paper 2 Computer Science SEPT 2013

312. Analog signal 6000 bps, 2000 baud: bits/signal element = ___

Data Communication and Computer Networks • Modulation • UGC NET Paper 2 Computer Science SEPT 2013

313. Which is not a broadcast routing algorithm?

Data Communication and Computer Networks • Routing • UGC NET Paper 2 Computer Science SEPT 2013

314. S1: hard handover retains source channel in parallel. S2: soft releases before new. Which?

Data Communication and Computer Networks • Wireless Handover • UGC NET Paper 2 Computer Science SEPT 2013

315. With 4-bit sequence numbers in sliding-window protocol, maximum window size is ___.

Data Communication and Computer Networks • Flow Control & Sliding Window • UGC NET Paper 2 Computer Science SEPT 2013

316. 10 signals 3000 Hz multiplexed by FDM with 300 Hz guardbands between adjacent channels. Minimum bandwidth?

Data Communication and Computer Networks • Frequency Division Multiplexing • UGC NET Paper 2 Computer Science SEPT 2013

317. IPv4 Options field may contain which of the following?

Data Communication and Computer Networks • IP Options • UGC NET Paper 2 Computer Science SEPT 2013

318. With network mask 255.255.240.0, what is the maximum number of hosts per subnet?

Data Communication and Computer Networks • IP Subnetting • UGC NET Paper 2 Computer Science SEPT 2013

319. A multiplexer carries six 1200 bps and n×300 bps terminals on a 9600 bps link. n = ?

Data Communication and Computer Networks • Statistical/Time Division Multiplexing • UGC NET Paper 2 Computer Science SEPT 2013

320. A bridge has access to _______ address in the same network.

Data Communication and Computer Networks • Bridges • UGC NET Paper 2 Computer Science SEPT 2013