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Computer Networking

Computer Networking
Which of the following protocols uses both TCP and UDP?

Telnet
SMTP
DNS
FTP

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Computer Networking
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.

8 Kbps
32 Kbps
500 Kbps
None of these
64 Kbps

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Computer Networking
Which of the following are layers in the TCP/IP model?1. Application2. Session3. Transport4. Internet5. Data Link6. Physical

3, 4 and 5
1 and 2
1, 3 and 4
2, 3 and 5

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Computer Networking
What is the main difference between DDCMP and SDLG?

SDLC has a IP address
SDLC does not use CRC
DDCMP does not need special hardware to final the beginning of a message.
None of these
DDCMP has a message header

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Computer Networking
The frequency range : 300 kHz to 3 MHz is used for

microwave communications, satellite and radar
None of these
TV transmission
FM radio transmission
AM radio transmission

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Computer Networking
What protocol does PPP use to identify the Network layer protocol?

NCP
LCP
ISDN
HDLC

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