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- Topic: Network Delay Assume two hosts, A and B, that are linked by a single link with a rate of R bps and are spaced m meters away from one another. A packet of size L bits is being sent from Host A to Host B. Suppose that the propagation through the connection is occurring at s meters/second. (Answer the following question while showing work) 1) When d-prop is bigger than d-trans, where is the packet's first bit at time t = d-trans? 2) At time t = d-trans, where d-prop is less than d-trans, where is the packet's first bit?Efficiency Principle:Ethernet V1 access protocol was designed to run at 10 Mbps over 2.5 Km using 1500 Byte packets. This same protocol needs to be used at 100 Mbps at the same efficiency (utilization). What distance can it cover if the frame size is not changed? (Note: be careful with the units.Computer Science A 10-Mb/s Classic Ethernet transmits data packets obtained from the Network Layer. Assume for simplicity that the obtained data packets are directly placed into the MAC Ethernet frame, i.e. that no extra bytes are added in the LLC sub-layer.
- TRUE OF FALSE Every network device implements the transport layer. [ ] In the Ring topology, each computer acts as repeater make error detection and boosts the signal before sending it on. [ ] In bus topology network media is inexpensive and easy to work with, so it is easier to trouble shoot than other topology. [ ] Error control only detects errorsTransmitted data in the transport layer of OSI model called O Bits O Segments Packets FramesTopic: Network Delay Assume two hosts, A and B, that are linked by a single link with a rate of R bps and are spaced m meters away from one another. A packet of size L bits is being sent from Host A to Host B. Suppose that the propagation through the connection is occurring at s meters/second. (Answer the following question while showing work) 1) Give an explanation of the propagation delay, d prop, in terms of the separation between the two hosts and the link's propagation speed. 2) Give examples of how the packet size and link speed affect the transmission time of the packet, d trans.
- True or False: [ ] In the Ring topology, each computer acts as repeater make error detection and boosts the signal before sending it on. [ ] Ethernet is a LAN so it is placed in the second layer of the OSI reference model. [ ] UDP provides connectionless service and delivers packets quickly. In case of packet loss, UDP does not provide retransmission.The term synchronization has many meanings in Computer Science. Within the networking field, the term is usually used to describe making asynchronous communication synchronous (A coordination of activities; running at the same rate) We see synchronization occurring in different layers, but we are mostly concerned with the physical layer and the data link layer (L1 and L2). a) In what ways is synchronization in these two layers similar? b) In what ways is synchronization in these two layers dissimilar?[ ] As the data packet moves from the lower to the upper layers, headers are added. [ ] Every network device implements the transport layer. [ ] In the Ring topology, each computer acts as repeater make error detection and boosts the signal before sending it on. [ ] In bus topology network media is inexpensive and easy to work with, so it is easier to trouble shoot than other topology. [ ] Error control only detects errors [ ] Ethernet is a LAN so it is placed in the second layer of the OSI reference model. [ ] UDP provides connectionless service and delivers packets quickly. In case of packet loss, UDP does not provide retransmission. [ ] UDP is the preferred over TCP for transferring a real-time voice over IP networks. [ ] In a bus topology, each station on the network is connected to two other stations, forming a loop or ring. [ ] IEEE international Telecommunication Union for creating protocols of internet. [ ] TCP protocol is slower than UDP?
- A 4480-octet datagram is to be transmitted and needs to be fragmented because it will pass through an Ethernet with a maximum payload of 1500 octets. Show the Total Length, More Flag, and Fragment Offset values in each of the resulting fragments.True or False: [ ] Routing decision is always required for every packet of a message at each node in packet switched network. [ ] In OSI model data link layer provides for the reliable transfer of information across the physical link; sends blocks (frames) with the necessary synchronization, error control, and flow control [ ] Because the boundaries between layer are well defined change in standard in one layer effect already existing software in another layer; this makes it difficult to introduce new standardCalculate the latency (from first bit sent to last bit received) for: (a) 1-Gbps Ethernet with a single store-and-forward switch in the path and a packet size of 5000 bits. Assume that each link introduces a propagation delay of 10 us and that the switch begins retransmitting immediately after it has finished receiving the packet. (b) Same as (a) but with three switches. (c) Same as (b), but assume the switch implements "cut- through" switching; it is able to begin retransmitting the packet after the first 128 bits have been received.
