Q1 4 Marks A Company Has A Network Address Of 192 168 1 0 With A Subnet Mask Of 255 255 255 0 The Company Wants To C 1 (40.02 KiB) Viewed 36 times
Q1. (4 marks) A company has a network address of 192.168.1.0 with a subnet mask of 255.255.255.0. The company wants to create 8 subnetworks. 1. Determine the class of this address. 2. How many bits must be borrowed from the host portion of the address? 3. Determine the new network mask. 4. Determine the address of the different subnets? 5. How many hosts can be connected to each subnet? Q2. (3 marks ) . 1. Briefly explain the difference between single-bit errors and burst errors. (3 marks) 2. Imagine that a noise event causes a burst error to occur that lasts for 1 ms (milli second). a. If data is being transmitted at 10 Mbps. How many data bits will be affected? b. If data is being transmitted at 100Mbps. How many data bits will be affected? A sender (S) wants to send a message M = 1110101101. It uses the CRC method to generate the Frame Check Sequence FCS. The used generator polynomial is given by G(x) = x5 + x4 + x2 + 1. 3. Give the polynomial M(x ) that represent the message M 4. Determine the sequence of bits ( 5 bits) that allows detecting errors. 5. Represent the binary whole message (T) send by the sender (S). 6. How does the receiver check whether the message T was transmitted without any errors
Q3. (3 marks) 1. What is MAC address? how many bits are used to code the MAC address ? 2. What are ARP and RARP protocols? 3. Can frames collide in CSMA and how? What is the problem in CSMA that CSMA/CD is trying to resolve? 4. How can CSMA/CA avoids collision?
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