# Assignment4 - Assignment4 Chapters(12-16 1 The network...

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Assignment4 Chapters (12-16) 1. The network shown in the figure below is an MPLS network with all routers configured as Label Switching Routers (LSRs). The path (LSPs) are determined using TE (Traffic Engineering). Fill in the R2 routing table (a) for paths with no tunnels and (b) for paths with tunnels T1 and T2. The address of each router is x.x.x.x where x is the router number, e.g., 1.1.1.1. R2 Routing table for paths (a) for paths with no tunnels Dest Out Interface Next Hop Matrix 1.1.1.1 I1 1.1.1.1 1 3.3.3.3 I3 3.3.3.3 1 4.4.4.4 I3 3.3.3.3 2 5.5.5.5 I1 1.1.1.1 2 6.6.6.6 I3 3.3.3.3 3 I1 1.1.1.1 3 (b) for paths with tunnels.
Dest Out Interface Next Hop Matrix 1.1.1.1 I1 1.1.1.1 1 3.3.3.3 I3 3.3.3.3 1 4.4.4.4 T1 4.4.4.4 2/1 5.5.5.5 I1 1.1.1.1 2 6.6.6.6 T1 4.4.4.4 3 / 2 2. Latency is a problem for interactive communication viasattelite. Calculate the orbital altitude and round-trip delaytime between two stations on the ground communicating via a geostationary satellite. Assume the radius of the orbitis 42,164 kilometers and the radius of the earth is 6,378kilometers. For this satellite the resulting orbital radius will be the radius of the orbit - radius of the earth = 42164 - 6378 = 35,786 kilometers r = 35786 Km This will be the actual altitude at which the satellite will rotate. Now to calculate the orbital speed of the satellite it will be v = w×r Where: v = velocity of the satellite w = angular speed of the satellite whichcanbeobtained by dividingthe angle travelled one revolutionof the satellite . w = 2 × pie /( number of seconds aday ) w = 2 × 3.14 /( 86400 seconds ) w = 10.91 × 10 5 Now use : v = w ×r r isthe altitude = 35786 Km v = 35786 × 10.9 × 10 5 = 3.90 km s
¿ 14040 km hour ¿ 3900 m / second now round tripdelay time = speed of satellite / speed of light = 3900 3 × 10 8 = 0.00013 ms 3. MTOSI and OASIS are standards that enable integration of distributed applications using SOA, discuss both of these standards. MTOSI: Multi-Technology Operations System Interface (MTOSI) is a standard for implementing interfaces between OSSs. Service providers (carriers) use multiple Operational Support Systems (OSS) to manage complex networks. Since the various parts of the network must interact, so must the OSSs. It is standardized by the Telemanagement Forum (TM Forum). The TMF Frameworx provides a set of reference models that aid in analyzing and designing next generation BSS and OSS solutions that may utilize the MTOSI interface specifications The main use for Multi-Technology Operations Systems Interface (MTOSI) is as an interface between Operations Systems. A given product will typically support either the client or server side of an MTOSI interface. MTOSI is an interesting concept for organisations that have multi-layered network (ie SONET/SDH/DWDM through to higher order layers such as IP and above with various different EMS) and/or multi-vendor networks as well as a variety of OSS/BSS tools. The theory is that commonality / consistency between interfaces should allow the various management applications (eg EMS, OSS, BSS, etc) to be integrated more quickly and easily.