COMPUTER NETWORKING QUIZ

Which of the following communications service provides message preparation and transmission facilities?

x400

Teletex

Fax

Teletext

None of these

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When creating a pool of global addresses, which of the following can be used instead of the netmask command?

block-size

no mask

/ (slash notation)

prefix-length

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Which transmission mode is used for data communication along telephone lines?

None of these

Parallel

Asynchronous

Serial

Synchronous

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A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.

500 Kbps

64 Kbps

8 Kbps

32 Kbps

None of these

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The transport layer protocol is connectionless.

None of these

UDP

NVT

TCP

FTP

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The communication mode that supports data in both directions at the same time is

None of these

half-duplex

full-duplex

simplex

multiplex

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Select the wrong data communication system component:

Medium

Protocol

Receiver

Transits

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RS-232-G

specifies only the mechanical characteristics of an interface by providing a 25-pin connector

None of these

requires only 7 pin out of 25 in order to transmit digital data over public telephone lines

is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment

is an interface between two data circuit terminating equipment as examplified by a local and remote modem

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Which of the following services use TCP?1. DHCP2. SMTP3. HTTP4. TFTP5. FTP

1, 3 and 4

1 and 2

2, 3 and 5

1, 2 and 4

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You want to improve network performance by increasing the bandwidth available to hosts and limit the size of the broadcast domains. Which of the following options will achieve this goal?

Managed hubs

Switches configured with VLANs

Bridges

Switches

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