Networked Computers, Routers And Data Links

“Networks are all around us. They are in our walls, in the air. At schools, hotels, hospitals, even coffee shops. Always there, always on…This power exists today. In our routers. In our switches... . (Cisco, n.d.)

For the past semester i have been a student in the cisco networking academy. Every chapter we learn many new and important things. From the protocols that let computer talk to each other to how to physically install the cables that they use. In this essay I will explain what we learned chapter by chapter. So lets start of at the beging with chapter one.

This assignment will be mainly about network components and how do they operate, what are their functions and what are their flaws.

Monitored the network congestion in order to achieve the optimal performance out of a network infrastructure.

We have simulated another network having 30 numbers of nodes. The simulation is made using the same platform used for network 1. This simulation is done taking node 1 as a source and node 28 as destination. The optimal path obtained in this simulation is 1-23-13-28, in which data rate is 0.47 kbps. The second optimal path is 1-17-28, in which data rate is 0.35 kbps. The simulated results are summarized here in

In order to evaluate the performance of the proposed DCHS algorithm, we compare MILP with the energy consumption and delay constrained routing protocol.

Simulation environment consists of wired, wireless and wired cum wireless network. Network simulator NS 2.35 [6] is used for the simulation. NS is a discrete event simulator, where the advance of times depends on the timing of events which are maintained by simulator.

| Using your textbook and web research, in your own words, summarize what you have learned about LAN modeling using OPNET ITGuru. Requirements: Minimum one paragraph per section; best practice is two or more

In today’s society, it is commonplace for one to be electronically “connected”, by using devices like computers, mobile smartphones, gaming devices, tablets or laptops. Typically there is some type of network, which enables us to be connected, such as a Wide Area Network (WAN), a Local Area Network (LAN) or even a Home Area Network (HAN). A WAN is the most expansive type of network commonly used, which can cover large geographical areas, usually by amalgamating multiple LANs. The most frequently used WAN is the internet, which many of us connect to daily. A smaller type of network is a LAN, most often used in the workplace to connect computers and devices in the same office or building, so users can collaborate and efficiently share resources.

software has lot of importance in recent years. A number of tools are available for testing network and communication protocols. NetIQ’s ANVL(Automated Network Validation Library) is to test routers and other networking products. The software generates packets in correct and incorrect formats to test the networking software.

Peterson, L. L., & Davie, B. S. (2011). Computer Networks, Fifth Edition: A Systems Approach (The Morgan Kaufmann Series in Networking). Morgan Kaufmann.

As this demand for dynamic and unpredictable data grows, more and more devices have to be added to existing networks and configured accordingly. The need of the hour is to regulate networks centrally and as a whole rather than configure individual network devices and gain more control to achieve flexibility in existing networks.

The latest Cisco IOS innovation of NetFlow of version 9 is flexible and extensible method to record network performance data. A comprehensive solution for NetFlow-based, planning, monitoring and billing can provides to customers.

The increasing usage of networks especially wireless networks for different applications, has moved to focus towards the design and optimal routing of the networks in the modern life. The use of wireless networks instead of wired networks solves many issues in real life. These challenges includes the Mobility, signal fading, power and energy, data rate, security etc.

It can provide applications like Traffic Engineering, Quality of Service and Virtual Private Networks. The packets in MPLS are directed through the network based on an assigned label. The label is associated through the network with an assigned path which allows a higher level of control on the packets than in packet-switched networks. MPLS routing allow differing QoS characteristics and priorities to be assigned to particular data flows. Traffic Engineering explains the optimization of fundamental abilities of the network [2]. “ Traffic Engineering is the process of controlling how traffic flows through ones network so as to optimize resource utilization and network performance”[3]. It is performed by detouring the traffic to paths that are lightly loaded in order to balance the load amongst the paths as per the various calculated metrics. These can be divided as two types. They are state dependent and time dependent. Both of them are focused to balance the traffic so that they can avoid the congestion. State dependent policies change the traffic in short time scale depending on different metrics calculated both online and offline of the present traffic and the time dependent policies engineer it based on long time scaling. Both these methods aim to balance the traffic so as to avoid the congestion.