LANT P LAN 1 Task 9 Link state routing (open shortest path first protocol) is used in the given network. F F Fa F F60 LAN 2 Fa F Gig LAN 2 Bandwidths of Fast Ethernet (100 Mbps) and Gigabit Ethernet (1000 Mbps) are known and the OSPF cost of an interface is defined as: Cost 100Mbps/ (interface bandwidth). Solve the subtasks below. Write down all assumptions. a) Determine routing table of router A (15p) Destination Next A vertex 1 B с D E F G H OSPF cost 0 b) Determine the lowest OSPF cost from the device in LAN 1 to the device in LAN 2. (5p) c) Draw all sink trees for Router A. One graph should represent one sink tree. (10p)

Assume 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?

A=32, B=33, C=34, D=35 x1, y1, z1 are the interfaces for the router gateway, while x2, x3, y2, y3, z2, z3 are for the router interface Find the Routing Table R1, R2, and R3 using the following table! Destination Next Hop Interface       With the Routing Table that you have specified in point a, which path will PC1B take when communicating with PC2B and PC3B In theory there is a routing table for Network Address 0.0.0.0 with a Subnet Mask of 0.0.0.0, explain the function of this routing table? Does the image network require routing at point c? Why?

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?