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4

In the symmetric-key method of cryptography, which key is publicly known?

A. Encryption key only

B. Decryption key only

C. Both

D. None of the above

Correct Answer :

B. Decryption key only


Related Questions

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4

Twisted-pair cable uses what type of connector?

A. RJ-11

B. XT-20

C. RJ-45

D. RJ-50

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4

At which layer of the OSI model do FTP, SMTP, POP3, and HTTP function?

A. Physical

B. Network

C. Transport

D. Application

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4

____________ was developed to support aggregation and summarization of routing
information.

A. Static Routing protocol

B. Enhanced Interior Gateway Routing Protocol (EIGRP)

C. Routing Information Protocol (RIP)

D. Border Gateway Protocol (BGP)

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4

Which of the following IEEE specifications uses CSMA/CD?

A. 802.2

B. 802.3

C. 802.5

D. 802.11b

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4

Which of the following connectors is used by UTP on a Fast Ethernet network?

A. ST

B. BNC

C. RJ-45

D. RJ-11

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4

In FTP, to execute a file transfer, the user begins by _________.

A. Navigating the directory structure

B. Connecting to a remote host

C. Listing files available for transfer.

D. Defining the transfer mode

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4

Which is the port used by POP3?

A. 69

B. 110

C. 143

D. 443

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4

How many table entries are supported by global routing table in CIDR?

A. 90,000

B. 80,000

C. 70,000

D. 60,000

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4

A router receives an IP packet with source IP address 130.45.3.3 and destination IP address 202.23.4.16. The router cannot find the destination IP address in its routing table. Which ICMP message should be sent?

A. Time stamp request

B. Router solicitation

C. Destination Unreachable

D. Parameter problem on a datagram

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4

What is the maximum size of IP header in the UDP Datagram format?

A. 40 bytes

B. 50 bytes

C. 60 bytes

D. 70 bytes

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4

Which directory service is used in Windows 2000 Server?

A. Active Directory

B. SAM

C. NDS

D. Bindery

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4

In Secure Electronic Transaction, the description of the purchase and cost is contained in
________ message.

A. Authorization

B. Purchase order

C. Inquiry

D. Capture

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4

Which class does the IP address 202.119.22.31 belong to?

A. Class A

B. Class B

C. Class C

D. APIPA

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4

AppleTalk protocol configures hosts in zones on the network.

A. True.

B. False.

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4

What is the default subnet mask for a class B network?

A. 255.0.0.0

B. 255.255.0.0

C. 255.255.255.0

D. 255.255.192.0

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4

Which of these is a feature of hubs?

A. Hubs amplify the incoming signal.

B. Hubs understand frames, packets or headers

C. All lines coming into a Hub must operate at a same speed.

D. all of these

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4

Which of the following states suggests that the connection has been ended either at the
request of the client or for any other reason?

A. Selected state

B. Authenticated state

C. Logout state

D. Non-authenticated state

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4

Router B receives an update from router A that indicates Net1 is two hops away. The next update from A says Net1 is five hops away. What value is entered in B's routing table for Net1? Assume the basic RIP is being used.

A. 6

B. 7

C. 2

D. 3

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4

How many layers are there in the OSI model?

A. 4

B. 5

C. 6

D. 7

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4

What is the default port for Telnet?

A. 23

B. 21

C. 25

D. 80

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4

You've taken your Windows 2000 laptop to a client's network and plugged it in. Your computer is configured for an IP network over 100BaseT using DHCP. You can't connect, even though the client says that DHCP is working on his 100BaseT network. What should

A. Use Ipconfig /release to release the old DHCP address.

B. Use Winipcfg and click Release to release the old DHCP address.

C. Use Ifconfig to initialize the NIC.

D. Use Tracert to determine the problem.

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4

To communicate across a TCP/IP network, you must have a DNS server and DNS clients installed.

A. True.

B. False.

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4

How many 64-Kbps channels are used on an ISDN BRI?

A. 1

B. 2

C. 3

D. 4

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4

ARP is defined in RFC _____ and it is a current internet standard, ________

A. RFC-37, STD 903

B. RFC-903, STD 37

C. RFC 826; STD 37

D. RFC 37; STD 826

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4

TCP protocol is responsible for connection-oriented communication

A. True.

B. False.

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4

What is the default subnet mask for a class A network?

A. 255.0.0.0

B. 255.224.0.0

C. 255.255.0.0

D. 255.255.255.0

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4

The network interface layer specifies how to organize data into………………………..and Internet layer specifies the format of …………………….. Sent across an Internet.

A. Bits, message.

B. frame,packet.

C. packet, messge.

D. datagram, packet.

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4

What is attenuation?

A. cable noise

B. cable shortage

C. loss of signal strength

D. unwanted signals on the network

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4

Pure ALOHA has a maximum throughput of -----------

A. 16.4 %

B. 18.4 %

C. 7.4 %

D. 1 %

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4

E-mail is an example of ………………………… mode of communication where one party can send a note to another person and the recipient need not be online to receive the e-mail.

A. asynchronous

B. synchronous

C. full duplex

D. either A or B