5. A 8-Mbps token ring has a token holding timer value of 10 msec. What is the longest frame (assume header bits are negligible) that can be sent on this ring?
At 8 Mbps, a station can transmit 80,000 bits or 10,000 bytes in 10 msec. This is an upper bound on frame length. From this amount, some overhead must be subtracted, giving a slightly lower limit for the data portion. Therefore, 10,000 B frame is the correct answer.
6. With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site?
7. Which of the following layer protocols are responsible for user and the application programme support such as passwords, resource sharing, file transfer and network management?