Answered Essay: Consider the following circuit-switched network. There are 4 circuits on each link. Label the four switches A, B

I. Consider the following circuit-switched network. There are 4 circuits on each link. Label the four switches A, B, C, and D. going in the clockwise direction. [4 pts] Figure 1.13 A simple ciruilswitched network conising four switches and four links a. What is the maximum number of simultaneous connections that can be in progress at any one time in this network? b. Suppose that all connections are between switches A and C. What is the maximum number of simultaneous connections that can be in progress? c. Suppose we want to make four connections between switches A and C and another four connections between switches B and D. Can we route these calls through the four links to accommodate all eight connections? If yes/no, why 2. We consider sending real-time voice from Host A to Host B over a packet-switched network (VolP). Host A converts analog voice to a digital 64 kbps bit stream on the fy. Host A then groups the bits into 56-byte packets. There is one link between Hosts A and B; its transmission rate is 2 Mbps and its propagation delay is 10 msec. As soon as Host A gathers a packet, it sends it to Host B. As soon as Host B receives an entire packet, it converts the packets bits to an analog signal. How much time elapses from the time a bit is created (from the original analog signal at Host A) until the bit is decoded (as part of the analog signal at Host B)? 3 pts] 3. Suppose N packets arrive simultaneously to a link at which no packets are currently being transmitted or queued. Each packet is of length L and the link has transmission rate R. What is the average queuing delay for the N packets? 3 pts]

Consider the following circuit-switched network. There are 4 circuits on each link. Label the four switches A, B, C, and D, going in the clockwise direction. a. What is the maximum number of simultaneous connections that can be in progress at any one time in this network? b. Suppose that all connections arc between switches A and C. What is the maximum number of simultaneous connections that can be in progress? c. Suppose we want to make four connections between switches A and C and another four connections between switches B and D. Can we route these calls through the four links to accommodate all eight connections? If yes/no, why? We consider sending real-time voice from Host A to Host B over a packet-switched network (VoIP). Host A converts analog voice to a digital 64 kbps bit stream on the fly. Host A then groups the bits into 56-byte packets. There is one link between Hosts A and B: its transmission rate is 2 Mbps and its propagation delay is 10 msec. As soon as Host A gathers a packet, it sends it to Host B. As soon as Host B receives an entire packet, it converts the packet’s bits to an analog signal. How much time elapses from the time a bit is created (from the original analog signal at Host A) until the bit is decoded (as part of the analog signal at Host B)? Suppose N packets arrive simultaneously to a link at which no packets are currently being transmitted or queued. Each packet is of length L and the link has transmission rate R. What is the average queuing delay for the N packets?

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