If a multi port bridge was used in a heavy load standard Ethernet network such that the traffic is not
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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:Q4: What is the total delay (latency) for a frame of size 6 million bits that is being sent on a link with 5 routers each having a queuing time of 5 µs and a processing time of 2 µs. The length of the link is 3000 Km. The speed of light inside the link is 2 x 1018 m/s. The link has a bandwidth of 10 Mbps. Which component of the total delay is dominant? Which one is negligible?A TCP connection is established through 10 wireless hops in an acoustic underwater ad hoc network. Assume that each hop is 100 meter in the average, acoustic signals travel 1500 meter per second, 10 kilobit data can be sent per second over a link, the source node has one megabyte of data to send, the receiver window size is 64 kilobytes, the maximum segment size is 1 kilobyte and the average processing delay for routing at each node is one millisecond. Assume also that the following segments do not reach the destination: 67, 112, 137. What would be the average utilization of the links for this connection if there is not another communications through them? Explain an alternative approach to increase the bandwidth utilization?
- Given a link with a maximum transmission rate of 34.1 Mbps. Only two computers, X and Y, wish to transmit starting at time t = 0 seconds. Computer X sends filex (19 MiB) and computer Y sends fileY (222 KiB), both starting at time t = 0. • Statistical multiplexing is used, with details as follows • Packet Payload Size = 1000 Bytes • Packet Header Size = 24 Bytes (overhead) • Ignore Processing and Queueing delays • Assume partial packets (packets consisting of less than 1000 Bytes of data) are padded so that they are the same size as full packets. • Assume continuous alternating-packet transmission. • Computer X gets the transmission medium first. At what time (t = ?) would Filey finish transmitting? Give answer in milliseconds, without units, and round to one decimal places (e.g. for an answer of 0.013777 seconds you would enter "13.8" without the quotes) 1.64. Consider a LAN cable with a 100Mbps network link which is connecting the two campuses of SEU. A PC from Lab1(SEUPC1) and other PC from lab2(SEUPC2) are the only two stations on this network. Each PCs has some frames to send. Both SEUPC1 and SEUPC2 attempt to send a frame, collided at the first transmission and this time SEUPC1 wins the backoff race. At the end of successful transmission by SEUPC1, both stations (SEUPC1 and SEUPC2) attempt to transmit and collide. What will be the probability that SEUPC2 wins the second backoff race?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?
- A network with Ethernet LAN protocol in MAC layer having minimum frame length is 1000 bits. If the speed of signal is 2x10³ m/s and length of cable is 1 km. Then what is the expected data rate in Mbps_ ?Router R1 is connected to another router R2 with link of L1 with a transmission rate of 67 packets/second. The link buffer at router R1 contains on an average 15 packets. There is one packet being currently transmitted. Average packet queuing delay is 15 milliseconds. Assuming no packet loss, what is the average packet arrival rate at R1?A 100M-bit Ethernet has the following topology Hub The maximum length of each cable is 100m. The signal propagation speed is 2 x 105 km/sec and the hub introduces a delay of 1 usec. What is the minimum frame size for this Ethernet. DO NOT ASSUME THE STANDARD MINIMUM FRAME SIZE OF 512 BITS.
- A 1-km-long, 10-Mbps CSMA/CD LAN (i.e., Classic Ethernet)has a propagation speed of 200 m/μsec (i.e., how fast the radio signal moves on the link). Thereare no repeaters in this system. Data frames are 512 bits long, including 480 bits of payload (i.e.,effective data) and 32 bits of overhead (e.g., header, checksum, and other overhead fields). Everydata frame should be confirmed by a 64-bit ACK frame. We assume the sender needs to use onecontention slot to seize the channel before transmitting the data frame, and the receiver needsto use one contention slot to seize the channel before transmitting the ACK frame. Answer thefollowing questions: a. What is the minimum length of a contention slot in μsec? b. What is the effective data rate for the sender to send one data frame? Assume that there areno collisions. Show the calculation c. What would be the impact on the total delay and the effective data rate if we used a longerdata payload size in the data frame? Given one application…Consider a router that interconnects three subnets: Subnet 1, Subnet 2 and Subnet 3. Suppose all interfaces in each of these three subnets are required to have the prefix 223.1.17/24. Also, suppose that subnet 1 is required to support at least 100 interfaces. Subnet 2 to support at least 120 interfaces and subnet three to support at least 12 interfaces. A possible network addressing which satisfies the above constraints is: Subnet 2: 223.1.17.0/25 Subnet 1: 223.1.17.128/25 - 223.1.17.240/28 Subnet 3: 223.1.17.240/28 Select one: O True O FalseConsider the following Aloha systems.(a) A group of N users share a 56 kbps pure Aloha channel. Each user generates at a Poisson rateof one 1000-bit packet every 100 sec, even if the previous one has not yet been sent. What is themaximum value of N (Hint: The pure Aloha maximum channel utilization is 18.4%)? (b) Ten thousand airline reservation stations are competing for the use of a single slotted Alohachannel. The average station makes 18 requests/hour. A slot is 125 μsec. What is the approximatetotal channel load (requests per slot)?