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401. |
Which one of the following protocol is used to receive mail messages? |
A. | smtp |
B. | post office protocol (pop) |
C. | internet message access protocol (imap) |
D. | ftp |
Answer» D. ftp |
402. |
What is on-demand mail relay (ODMR)? |
A. | protocol for smtp security |
B. | an smtp extension |
C. | protocol for web pages |
D. | protocol for faster mail transfer |
Answer» B. an smtp extension |
403. |
An email client needs to know the _________ of its initial SMTP server. |
A. | ip address |
B. | mac address |
C. | url |
D. | name |
Answer» A. ip address |
404. |
An SMTP session may not include _______ |
A. | zero smtp transaction |
B. | one smtp transaction |
C. | more than one smtp transaction |
D. | one http transaction |
Answer» D. one http transaction |
405. |
SMTP defines _______ |
A. | message transport |
B. | message encryption |
C. | message content |
D. | message password |
Answer» A. message transport |
406. |
SMTP is not used to deliver messages to ______ |
A. | user’s terminal |
B. | user’s mailbox |
C. | user’s word processor |
D. | user’s email client |
Answer» C. user’s word processor |
407. |
The entire hostname has a maximum of ___________ |
A. | 255 characters |
B. | 127 characters |
C. | 63 characters |
D. | 31 characters |
Answer» A. 255 characters |
408. |
A DNS client is called _________ |
A. | dns updater |
B. | dns resolver |
C. | dns handler |
D. | none of the mentioned |
Answer» B. dns resolver |
409. |
Servers handle requests for other domains _______ |
A. | directly |
B. | by contacting remote dns server |
C. | it is not possible |
D. | none of the mentioned |
Answer» B. by contacting remote dns server |
410. |
DNS database contains _______ |
A. | name server records |
B. | hostname-to-address records |
C. | hostname aliases |
D. | all of the mentioned |
Answer» D. all of the mentioned |
411. |
If a server has no clue about where to find the address for a hostname then _______ |
A. | server asks to the root server |
B. | server asks to its adjcent server |
C. | request is not processed |
D. | none of the mentioned |
Answer» A. server asks to the root server |
412. |
Wildcard domain names start with label _______ |
A. | @ |
B. | * |
C. | & |
D. | # |
Answer» B. * |
413. |
The domain name system is maintained by _______ |
A. | distributed database system |
B. | a single server |
C. | a single computer |
D. | none of the mentioned |
Answer» A. distributed database system |
414. |
Secure shell (SSH) network protocol is used for __________ |
A. | secure data communication |
B. | remote command-line login |
C. | remote command execution |
D. | all of the mentioned |
Answer» D. all of the mentioned |
415. |
SSH can be used in only _____________ |
A. | unix-like operating systems |
B. | windows |
C. | both unix-like and windows systems |
D. | none of the mentioned |
Answer» C. both unix-like and windows systems |
416. |
SSH uses ___________ to authenticate the remote computer. |
A. | public-key cryptography |
B. | private-key cryptography |
C. | any of public-key or private-key |
D. | both public-key & private-key |
Answer» A. public-key cryptography |
417. |
Which standard TCP port is assigned for contacting SSH servers? |
A. | port 21 |
B. | port 22 |
C. | port 23 |
D. | port 24 |
Answer» B. port 22 |
418. |
Which one of the following is a file transfer protocol using SSH? |
A. | scp |
B. | sftp |
C. | rsync |
D. | all of the mentioned |
Answer» D. all of the mentioned |
419. |
SSH-2 does not contain ______________ |
A. | transport layer |
B. | user authentication layer |
C. | physical layer |
D. | connection layer |
Answer» C. physical layer |
420. |
Which one of the following feature was present in SSH protocol, version 1? |
A. | password changing |
B. | periodic replacement of session keys |
C. | support for public-key certificates |
D. | none of the mentioned |
Answer» D. none of the mentioned |
421. |
SCP protocol is evolved from __________ over SSH. |
A. | rcp protocol |
B. | dhcp protocol |
C. | mgcp protocol |
D. | gcp protocol |
Answer» A. rcp protocol |
422. |
Which one of the following authentication method is used by SSH? |
A. | public-key |
B. | host based |
C. | password |
D. | all of the mentioned |
Answer» D. all of the mentioned |
423. |
DHCP (dynamic host configuration protocol) provides __________ to the client. |
A. | ip address |
B. | mac address |
C. | url |
D. | none of the mentioned |
Answer» A. ip address |
424. |
DHCP is used for ________ |
A. | ipv6 |
B. | ipv4 |
C. | both ipv6 and ipv4 |
D. | none of the mentioned |
Answer» C. both ipv6 and ipv4 |
425. |
The DHCP server _________ |
A. | maintains a database of available ip addresses |
B. | maintains the information about client configuration parameters |
C. | grants a ip address when receives a request from a client |
D. | all of the mentioned |
Answer» D. all of the mentioned |
426. |
IP assigned for a client by DHCP server is |
A. | for a limited period |
B. | for an unlimited period |
C. | not time dependent |
D. | none of the mentioned |
Answer» A. for a limited period |
427. |
DHCP uses UDP port _________ for sending data to the server. |
A. | 66 |
B. | 67 |
C. | 68 |
D. | 69 |
Answer» B. 67 |
428. |
DHCP client and servers on the same subnet communicate via _________ |
A. | udp broadcast |
B. | udp unicast |
C. | tcp broadcast |
D. | tcp unicast |
Answer» A. udp broadcast |
429. |
WPA2 is used for security in _______ |
A. | ethernet |
B. | bluetooth |
C. | wi-fi |
D. | |
Answer» C. wi-fi |
430. |
VPNs are financially speaking __________ |
A. | always more expensive than leased lines |
B. | always cheaper than leased lines |
C. | usually cheaper than leased lines |
D. | usually more expensive than leased lines |
Answer» C. usually cheaper than leased lines |
431. |
Storage management comprises of _______________ |
A. | san management |
B. | data protection |
C. | disk operation |
D. | all of the mentioned |
Answer» D. all of the mentioned |
432. |
Which of the following is not a storage device? |
A. | switch |
B. | raid arrays |
C. | tape drives |
D. | hub |
Answer» D. hub |
433. |
Which protocols are used for Storage management? |
A. | snmp |
B. | ldap |
C. | pop3 |
D. | mib |
Answer» A. snmp |
434. |
How do Storage administrators ensure secure access to storage devices? |
A. | by using zoning |
B. | by putting a physical lock on the storage device |
C. | by keeping devices shutdown when not in use |
D. | by keeping devices when used |
Answer» A. by using zoning |
435. |
Effective Storage management does not include __________ |
A. | security |
B. | backups |
C. | reporting |
D. | connection |
Answer» D. connection |
436. |
SMI-S Standard uses which of the following? |
A. | java rmi |
B. | cim-xml/http |
C. | corba |
D. | .net |
Answer» B. cim-xml/http |
437. |
Full duplex mode increases the capacity of each domain by ________ |
A. | 10 to 20 mbps |
B. | 20 to 30 mbps |
C. | 30 to 40 mbps |
D. | 40 to 50 mbps |
Answer» A. 10 to 20 mbps |
438. |
Configuration management can be divided into which two subsystems? |
A. | reconfiguration and documentation |
B. | management and configuration |
C. | documentation and dialing up |
D. | configuration and dialing up |
Answer» A. reconfiguration and documentation |
439. |
To use a Simple Network Management System, we need _______ |
A. | servers |
B. | ip |
C. | protocols |
D. | rules |
Answer» D. rules |
440. |
The main difference between SNMPv3 and SNMPv2 is _______ |
A. | management |
B. | integration |
C. | classification |
D. | enhanced security |
Answer» D. enhanced security |
441. |
BER stands for ________ |
A. | basic encoding rules |
B. | basic encoding resolver |
C. | basic encoding rotator |
D. | basic encoding router |
Answer» A. basic encoding rules |
442. |
SNMP is the framework for managing devices in an internet using the ______ |
A. | tcp/ip protocol |
B. | udp |
C. | smtp |
D. | none |
Answer» A. tcp/ip protocol |
443. |
Structure of Management Information (SMI), is the guideline of ________ |
A. | http |
B. | snmp |
C. | url |
D. | mib |
Answer» B. snmp |
444. |
The application layer protocol used by a Telnet application is ________ |
A. | telnet |
B. | ftp |
C. | http |
D. | smtp |
Answer» A. telnet |
445. |
_______ allows you to connect and login to a remote computer |
A. | telnet |
B. | ftp |
C. | http |
D. | smtp |
Answer» A. telnet |
446. |
Telnet is used for _______ |
A. | television on net |
B. | network of telephones |
C. | remote login |
D. | teleshopping site |
Answer» C. remote login |
447. |
Which one of the following is not correct? |
A. | telnet is a general purpose client-server program |
B. | telnet lets user access an application on a remote computer |
C. | telnet can also be used for file transfer |
D. | telnet can be used for remote login |
Answer» C. telnet can also be used for file transfer |
448. |
Which operating mode of telnet is full duplex? |
A. | default mode |
B. | server mode |
C. | line mode |
D. | character mode |
Answer» C. line mode |
449. |
If we want that a character be interpreted by the client instead of server _________ |
A. | interpret as command (iac) escape character has to be used |
B. | control functions has to be disabled |
C. | it is not possible |
D. | cli character has to be used |
Answer» A. interpret as command (iac) escape character has to be used |
450. |
Telnet protocol is used to establish a connection to __________ |
A. | tcp port number 21 |
B. | tcp port number 22 |
C. | tcp port number 23 |
D. | tcp port number 25 |
Answer» C. tcp port number 23 |
451. |
Which one of the following is not true? |
A. | telnet defines a network virtual terminal (nvt) standard |
B. | client programs interact with nvt |
C. | server translates nvt operations |
D. | client can transfer files using to remote server using nvt |
Answer» D. client can transfer files using to remote server using nvt |
452. |
All telnet operations are sent as ________ |
A. | 4 bits |
B. | 8 bits |
C. | 16 bits |
D. | 32 bits |
Answer» B. 8 bits |
453. |
AbsoluteTelnet is a telnet client for _______ Operating system. |
A. | windows |
B. | linux |
C. | mac |
D. | ubuntu |
Answer» A. windows |
454. |
The decimal code of Interpret as Command (IAC) character is _______ |
A. | 252 |
B. | 253 |
C. | 254 |
D. | 255 |
Answer» D. 255 |
455. |
Which of the following is false with respect to TCP? |
A. | connection-oriented |
B. | process-to-process |
C. | transport layer protocol |
D. | unreliable |
Answer» D. unreliable |
456. |
In TCP, sending and receiving data is done as _______ |
A. | stream of bytes |
B. | sequence of characters |
C. | lines of data |
D. | packets |
Answer» A. stream of bytes |
457. |
TCP groups a number of bytes together into a packet called _______ |
A. | packet |
B. | buffer |
C. | segment |
D. | stack |
Answer» C. segment |
458. |
Communication offered by TCP is ________ |
A. | full-duplex |
B. | half-duplex |
C. | semi-duplex |
D. | byte by byte |
Answer» A. full-duplex |
459. |
The value of acknowledgement field in a segment defines _______ |
A. | sequence number of the byte received previously |
B. | total number of bytes to receive |
C. | sequence number of the next byte to be received |
D. | sequence of zeros and ones |
Answer» C. sequence number of the next byte to be received |
460. |
Size of TCP segment header ranges between ___________ |
A. | 16 and 32 bytes |
B. | 16 and 32 bits |
C. | 20 and 60 bytes |
D. | 20 and 60 bits |
Answer» C. 20 and 60 bytes |
461. |
Connection establishment in TCP is done by which mechanism? |
A. | flow control |
B. | three-way handshaking |
C. | forwarding |
D. | synchronization |
Answer» B. three-way handshaking |
462. |
SYNC flooding attack belongs to a type of security attack known as ___________ |
A. | sync flooding attack |
B. | active attack |
C. | passive attack |
D. | denial-of-service attack |
Answer» D. denial-of-service attack |
463. |
What allows TCP to detect lost segments and in turn recover from that loss? |
A. | sequence number |
B. | acknowledgment number |
C. | checksum |
D. | both sequence & acknowledgment number |
Answer» B. acknowledgment number |
464. |
Which of the following is false with respect to UDP? |
A. | connection-oriented |
B. | unreliable |
C. | transport layer protocol |
D. | low overhead |
Answer» A. connection-oriented |
465. |
Return value of the UDP port “Chargen” is _______ |
A. | string of characters |
B. | string of integers |
C. | array of characters with integers |
D. | array of zero’s and one’s |
Answer» A. string of characters |
466. |
Beyond IP, UDP provides additional services such as _______ |
A. | routing and switching |
B. | sending and receiving of packets |
C. | multiplexing and demultiplexing |
D. | demultiplexing and error checking |
Answer» D. demultiplexing and error checking |
467. |
What is the main advantage of UDP? |
A. | more overload |
B. | reliable |
C. | low overhead |
D. | fast |
Answer» C. low overhead |
468. |
Port number used by Network Time Protocol (NTP) with UDP is ________ |
A. | 161 |
B. | 123 |
C. | 162 |
D. | 124 |
Answer» B. 123 |
469. |
What is the header size of a UDP packet? |
A. | 8 bytes |
B. | 8 bits |
C. | 16 bytes |
D. | 124 bytes |
Answer» A. 8 bytes |
470. |
The port number is “ephemeral port number”, if the source host is _______ |
A. | ntp |
B. | echo |
C. | server |
D. | client |
Answer» D. client |
471. |
“Total length” field in UDP packet header is the length of _________ |
A. | only udp header |
B. | only data |
C. | only checksum |
D. | udp header plus data |
Answer» D. udp header plus data |
472. |
Which is the correct expression for the length of UDP datagram? |
A. | udp length = ip length – ip header’s length |
B. | udp length = udp length – udp header’s length |
C. | udp length = ip length + ip header’s length |
D. | udp length = udp length + udp header’s length |
Answer» A. udp length = ip length – ip header’s length |
473. |
The ______ field is used to detect errors over the entire user datagram. |
A. | udp header |
B. | checksum |
C. | source port |
D. | destination port |
Answer» B. checksum |
474. |
IPsec defines two protocols: _______ and ________ |
A. | ah; ssl |
B. | pgp; esp |
C. | ah; esp |
D. | pgp; ssl |
Answer» C. ah; esp |
475. |
IP Security operates in which layer of the OSI model? |
A. | network |
B. | transport |
C. | application |
D. | physical |
Answer» A. network |
476. |
ESP does not provide ________ |
A. | source authentication |
B. | data integrity |
C. | privacy |
D. | error control |
Answer» D. error control |
477. |
Two broad categories of congestion control are |
A. | open-loop and closed-loop |
B. | open-control and closed-control |
C. | active control and passive control |
D. | active loop and passive loop |
Answer» A. open-loop and closed-loop |
478. |
In open-loop control, policies are applied to __________ |
A. | remove after congestion occurs |
B. | remove after sometime |
C. | prevent before congestion occurs |
D. | prevent before sending packets |
Answer» C. prevent before congestion occurs |
479. |
Retransmission of packets must not be done when _______ |
A. | packet is lost |
B. | packet is corrupted |
C. | packet is needed |
D. | packet is error-free |
Answer» D. packet is error-free |
480. |
Discarding policy is mainly done by _______ |
A. | sender |
B. | receiver |
C. | router |
D. | switch |
Answer» C. router |
481. |
Closed-Loop control mechanisms try to _________ |
A. | remove after congestion occurs |
B. | remove after sometime |
C. | prevent before congestion occurs |
D. | prevent before sending packets |
Answer» A. remove after congestion occurs |
482. |
Backpressure technique can be applied only to _______ |
A. | congestion networks |
B. | closed circuit networks |
C. | open circuit networks |
D. | virtual circuit networks |
Answer» D. virtual circuit networks |
483. |
The packet sent by a node to the source to inform it of congestion is called _______ |
A. | explicit |
B. | discard |
C. | choke |
D. | backpressure |
Answer» C. choke |
484. |
Which of the following is not a characteristic of Virtual Circuit Network? |
A. | there are setup and teardown phases in addition to the data transfer phase |
B. | resources can be allocated during setup phase or on demand |
C. | all packets follow the same path established during the connection |
D. | virtual circuit network is implemented in application layer |
Answer» D. virtual circuit network is implemented in application layer |
485. |
Which of the following is not a phase of virtual circuit network? |
A. | setup phase |
B. | data transfer phase |
C. | termination phase |
D. | teardown phase |
Answer» C. termination phase |
486. |
Steps required in setup process are ___________ |
A. | setup request and acknowledgement |
B. | setup request and setup response |
C. | setup request and setup termination |
D. | setup and termination steps |
Answer» A. setup request and acknowledgement |
487. |
Delay of the resource allocated during setup phase during data transfer is ________ |
A. | constant |
B. | increases for each packet |
C. | same for each packet |
D. | different for each packet |
Answer» C. same for each packet |
488. |
Delay of the resource allocated on demand during data transfer is ________ |
A. | constant |
B. | increases for each packet |
C. | same for each packet |
D. | different for each packet |
Answer» D. different for each packet |
489. |
In data transfer phase, how many columns does the table contain? |
A. | 1 |
B. | 2 |
C. | 3 |
D. | 4 |
Answer» D. 4 |
490. |
ATM and frame relay are ________ |
A. | virtual circuit networks |
B. | datagram networks |
C. | virtual private networks |
D. | virtual public networks |
Answer» A. virtual circuit networks |
491. |
ATM uses _______________ |
A. | asynchronous frequency division multiplexing |
B. | asynchronous time division multiplexing |
C. | asynchronous space division multiplexing |
D. | asynchronous amplitude division multiplexing |
Answer» B. asynchronous time division multiplexing |
492. |
ATM standard defines _______ layers. |
A. | 2 |
B. | 3 |
C. | 4 |
D. | 5 |
Answer» B. 3 |
493. |
ATM can be used for ________ |
A. | local area network |
B. | wide area network |
C. | campus area network |
D. | networks covering any range |
Answer» D. networks covering any range |
494. |
An ATM cell has the payload field of __________ |
A. | 32 bytes |
B. | 48 bytes |
C. | 64 bytes |
D. | 128 bytes |
Answer» B. 48 bytes |
495. |
Frame relay has error detection at the ______ |
A. | physical layer |
B. | data link layer |
C. | network layer |
D. | transport layer |
Answer» B. data link layer |
496. |
Virtual circuit identifier in frame relay is called ______ |
A. | data link connection identifier |
B. | frame relay identifier |
C. | cell relay identifier |
D. | circuit connection identifier |
Answer» A. data link connection identifier |
497. |
Frame relay has _______ |
A. | only physical layer |
B. | only data link layer |
C. | only network layer |
D. | both physical and data link layer |
Answer» D. both physical and data link layer |
498. |
In frame relay networks, extended address is used _______ |
A. | to increase the range of data link connection identifiers |
B. | for error detection |
C. | for encryption |
D. | for error recovery |
Answer» A. to increase the range of data link connection identifiers |
499. |
What is FRAD in frame relay network? |
A. | frad assembles and disassembles the frames coming from other protocols |
B. | frad is used for modulation and demodulation |
C. | frad is used for error detection |
D. | frad is used for error recovery |
Answer» A. frad assembles and disassembles the frames coming from other protocols |
500. |
Frame Relay is cheaper than other _____ |
A. | lans |
B. | wans |
C. | mans |
D. | multipoint networks |
Answer» B. wans |
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