What is the greatest and minimum waiting time for a node on a 10 Mbps ethernet network after the 15th collision?
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What is the greatest and minimum waiting time for a node on a 10 Mbps ethernet network after the 15th collision?
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- If a two port bridge was used in a heavy load standard Ethernet network such that the traffic is going through it. If each station is theoretically given a capacity of5Mbpsand the number of stations in each LAN segment is equal, then the number of stations in each LAN is:What is the maximum and minimum waiting time for a node on a 10 Mbps ethernet network after the 15th collision?Computer Networks Problem In the CSMA/CD protocol, the network adapter waits K-512 bit times after a collision, where K is drawn randomly. For K=20, how long does the adapter wait until returning to Step 2 for a 10 Mbps broadcast channel?
- An Internet-service provider company uses a fiber-optic network to transmit data between locations. Data are carried through fiber-optic cables and switching nodes. A portion of the company's transmission network is shown here. The numbers above each arc show the capacity in gigabits of data per second that can be transmitted over that branch of the network. 3 4 3 4 2 4 1 2 6 5 5 3 2 7 To keep up with the volume of information transmitted between origin and destination points, use the network to determine the maximum amount of data, in gigabits per second, that may be sent from node 1 to node 7. X GB/s 1Assume the VC number of a virtual-circuit network is a 16-bit field. What is the maximum number of virtual circuits that can be carried over a link? If the path and the VC number for each VC are determined by a central node of the network and the same VC number is used for all links along the path of same VC, how does the central node determine the VC number at the setup time?Suppose that there are three inter-media nodes between Host 1 and Host 2, and the transmission rate of each link is 4.096 Mbps. The time of end-to-end circuit established is 0.5 second. How much seconds does it take to send a file of 8.192M byte from host H1 to host H2 over a packet-switched network?
- Assume that there is a shared connection (for example, an Ethernet bus) with a speed of 1 Mbps. How much time (in microseconds) is required to send a frame with a length of 1000 bits over this link?Suppose that our network is made of two computers. The computers are connected to eachother with three separate cables (links). The probability to fail for the first cable is 10%., for thesecond cable is 20% and for the third cable is 30%. What is our network reliability? Explain theresult and how it was calculated.A data channel at 5 Gbps is shared by two users. Assume that each user is transmitting at 2.5Gbps data rate continuously. Each user only transmits only 30% of the time. (a) If circuit switching is used, how many users can be supported? (b) If packet switching is used, would there be queuing delay to accommodate these two users? If a third identical user is added will there be a queuing delay? (c) What is the probability that a user is sending data? (d) Now assume three users under packet switching. Compute the probability that at any given time all three are transmitting at the same time. What is the fraction of time when the queue is growing?
- An entry in the switching table of a virtual-circuit network is normally created during the setup phase and deleted during the teardown phase. In other words, the entries in this type of network reflect the current connections, the activity in the network. In contrast, the entries in a routing table of a datagram network do not depend on the current connections; they show the configuration of the network and how any packet should be routed to a final destination. The entries may remain the same even if there is no activity in the network. The routing tables, however, are updated if there are changes in the network. Can you explain the reason for these two different characteristics? Can we say that a virtual-circuit is a connection oriented network and a datagram network is a connectionless network because of the above characteristics?(b) The Internet Protocol (IP) can sometimes surprise with its flexibility. Since the overall design is close enough to the principles of the OSI Protocol Model, IP is independent of the Data Link and Physical network layers. And some Norwegians indeed showed successful IP network transmission is possible with carrier pigeons. If we would want to attempt to use carrier pigeons to establish a TCP connection between Canterbury and London, how long would it take to successfully establish the transmission under perfect conditions? (Assume the pigeons are perfectly reliable.) Explain how you come to your result. (1)A TCP PDU of length 40,513 octets (including the TCP header) is to be transmitted over a physical link between two nodes at 1,064,218,818 bps using 802.3 with an MTU of 826 octets. Assume a LLC-PDU has an overhead of 4 octets and that the IP-PDU has no options. i) How many bits are sent over the connection from the source to destination assuming only full frames are sent? ii) What is the effective data rate from the TCP-PDU point of view (to nearest integer)? iii) If the propagation time between the two nodes is 5 microseconds what is the line efficiency to 3 decimal places assuming stop and wait is used between the two nodes?