Question

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An ISP has a CIDR block 71.94.128.0/17 (01000111 01011110 10000000 00000000). The ISP wants to sub-divide this into 4 smaller CIDR blocks (all of the same size) for its customers.

a. How many bits should the ISP add to the mask to identify the subnets?

b. What are the addresses of each smaller block in binary?

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A large IPv4 packet with Identification = 123 and with a 20 byte header and 1000 bytes of payload data is fragmented into three smaller packets to travel across a network with a MTU of 460 bytes. The first two fragments each hold 440 bytes of payload data and a 20 byte header, and the last fragment holds 120 bytes of payload data and a 20 byte header. What are the fragmentation-related header fields for the second fragment?

Total length =

Identification =   

Offset =

More fragments =

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Assume the school has a network address of 128.235.204.0/20. Is 128.235.209.20 on the network?

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Consider the sinusoid: f(t) = 6sin(2π2t + π/2). Assume frequency is in Hertz and amplitude is in Volts.

a.What is the amplitude?

b.What is the frequency?

c.What is the phase?  

d.What is the period?  

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Convert 11000000.10000101.00010110.00000001 to decimal.

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Find the minimum output bandwidth for a FDM multiplexer shown below. Each input has a 2000Hz bandwidth and there is a 200Hz guard band between each channel.

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Answer 1