Q. A serial transmission Ti uses 8 information bits, 2 start bits, 1 stop bit and 1 parity bit for each character. A synchronous transmission T2 uses 3 eight bit sync characters followed by 30 eight bit information characters. If the bit rate is 1200 bits/second in both cases, what are the transfer rates of Ti and T2?

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Q. In a sliding window ARQ scheme, the transmitter's window size is N and the receiver's window size is M. The minimum number of distinct sequence numbers required to ensure correct operation of the ARQ scheme is

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Q. Which one of the following protocols is NOT used to resolve one form of address to another one?

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Q. Identify the correct sequence in which the following packets are transmitted on the network by a host when a browser requests a webpage from a remote server, assuming that the host has just been restarted.

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Q. A firewall is to be configured to allow hosts in a private network to freely open TCP connections and send packets on open connections. However, it will only allow external hosts to send packets on existing open TCP connections or connections that are being opened (by internal hosts) but not allow them to open TCP connections to hosts in the private network. To achieve this the minimum capability of the firewall should be that of

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Q. Which protocol will be used to automate the IP configuration mechanism which includes IP address, subnet mask, default gateway, and DNS information?

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Q. In Go–back 3 flow control protocol every 6th packet is lost. If we have to send 11 packets. How many transmissions will be needed ?

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Q. What will be the total minimum bandwidth of the channel required for 7 channels of 400 kHz bandwidth multiplexed together with each guard band of 20 kHz?

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Q. Which of the following is false:

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Q. The subnet mask for a particular network is 255.255.31.0. Which of the following pairs of IP addresses could belong to this network?

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Q. Which of the following protocol is called as byte-oriented protocol?

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Q. If syn = 0 and ack = 1, it indicates

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Q. A DNS.....................server gets its data from another DNS server.

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Q. The .............................field in the MIME header describes the method used to encode the data.

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Q. A client message usually needs ........................ to send mail.

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Q. Which one is not a method of HTTP?

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Q. Which one of the following is a communication protocol used for email?

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Q. Which one of the following statement about email is false?

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Q. Which one of the following can be used on the IP network to monitor a router?

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Q. Which of the following is true?

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