Routers Essay

Routers Essay

Length: 5394 words (15.4 double-spaced pages)

Rating: Powerful Essays

Open Document

Essay Preview

Routers

A router is a type of internetworking device that passes data packets between networks based on Layer 3 addresses. A router has the ability to make intelligent decisions regarding the best path for delivery of data on the network. In this chapter, you will learn how routers use a Layer 3 addressing scheme to make forwarding decisions. In addition, you will learn how devices on local-area networks (LANs) use Address Resolution Protocol (ARP) before forwarding data to a destination. You will learn what happens when a device on one network does not know the MAC address of a device on another network. You will learn that Reverse Address Resolution Protocol (RARP) is the protocol a device uses when it does not know its own IP address. Lastly, you will learn the difference between routing and routed protocols and how routers track distance between locations. You will also learn about distance-vector, link-state, and hybrid routing approaches and how each resolves common routing problems. In networking, there are two addressing schemes: one uses the MAC address, a data link (Layer 2) address; the other uses an address located at the network layer (Layer 3) of the OSI model. An example of a Layer 3 address is an IP address. A router is a type of internetworking device that passes data packets between networks, based on Layer 3 addresses. A router has the ability to make intelligent decisions regarding the best path for delivery of data on the network. Bridges and switches use physical, or MAC addresses, to make data forwarding decisions. Routers use a Layer 3 addressing scheme to make forwarding decisions. They use IP, or logical addresses, rather than MAC addresses. Because IP addresses are implemented in software, and refer t...


... middle of paper ...


... device that originated a RARP request receives a RARP reply, it copies its IP address into its memory cache, where it will reside for as long as the session lasts. · routers, like every other device on the network, send and receive data on the network, and build ARP tables that map IP addresses to MAC addresses · if the source resides on a network that has a different network number than the desired destination, and if the source does not know the MAC address of the destination, it will have to use the router as a default gateway for its data to reach the destination · routed protocols direct user traffic, whereas routing protocols work between routers to maintain path tables · network discovery for distance-vector routing involves exchange of routing tables The next chapter discusses the functions of the transport layer.




Bibliography:

www.news.com

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Routers Essay

- TABLE OF CONTENTS Introduction …………………………………………………………………………2 Router Architecture …………………………….……….…………………………3 Basic Building Blocks ……………………………………………………………………………………………..3 Physical Components………………………………………………………………………………………………5 Router Architecture Classification …………………………………………7 First Generation……………………………………………………………………………………………………..7 Second Generation …….…………………………………………………………………………………………..8 Third Generation……..……………………………………………………………………………………………..9 Switching Architecture …………………………………………………………11 Output Queuing……………………………………………………………………………………………………..12 Input Queuing ……………………………………………………………………………………………………….12...   [tags: computer technology, data transmission]

Powerful Essays
3042 words (8.7 pages)

Robust Routers Job Offer Negotiation Essay

- In the simulation involving a negotiation over a job offer at Robust Routers, I played the role of the human resource director; Leigh Bultema, and my partner played the role of Joe Tech; the recent MBA graduate seeking permanent employment with the technology company. Joe is not in agreement with the terms of the original offer and would like to negotiate the terms of certain issues within the bargaining mix. One key issue Joe is negotiating is the relocation to Robust Routers headquarters in Silicon Valley, California....   [tags: Job Offer Negotiation]

Powerful Essays
1193 words (3.4 pages)

Essay on Routers An Overview

- Routers 1 Routers 2 Introduction The purpose of this paper is give a summary of the function and use of Routers in today’s information age. To cover the complete subject of routers and routing, would be beyond the scope of this research paper. However the basic definition of a router is “ A device used to connect networks of different types, such as those using different architectures and protocols. Routers work at the Network layer of the OSI model. This means they can switch and route packets across multiple networks....   [tags: essays research papers]

Powerful Essays
1538 words (4.4 pages)

Routers Essay

- Routers A router is a type of internetworking device that passes data packets between networks based on Layer 3 addresses. A router has the ability to make intelligent decisions regarding the best path for delivery of data on the network. In this chapter, you will learn how routers use a Layer 3 addressing scheme to make forwarding decisions. In addition, you will learn how devices on local-area networks (LANs) use Address Resolution Protocol (ARP) before forwarding data to a destination. You will learn what happens when a device on one network does not know the MAC address of a device on another network....   [tags: Papers]

Powerful Essays
5394 words (15.4 pages)

Designing More Sophisticated Security On Their Routers And Switches Essay

- My initial assignment was to enable and configure more sophisticated security on their routers and switches. However, after a week of twiddling I grew extremely frustrated and asked my manager to be moved to a different task. I’m glad I did, because the tasks they gave afterwards were interesting and challenging, but not frustrating. The tasks were mainly code clean up and ease of life improvement in the codebase. I found these to be a good warm up to the codebase. After one month I was finally given my own project....   [tags: Employment, Learning, Task, Intern]

Powerful Essays
983 words (2.8 pages)

Essay on Questions and Answers: Resouce Allocation and Congestion Control

- 1) What is resource allocation. In networking protocols layers a lot of data is transferred between different processes across a heterogeneous network. Also lot of resources are shared like bandwidth of links or the routers in buffers, where there can be many packets which are queued for transmitting from different processes. It can happen that too many packets are on same link and the queue overflows where packets can be lost or even they need to be dropped. Thus to avoid this congestion resource allocation is done....   [tags: networking, routers]

Powerful Essays
765 words (2.2 pages)

Fast PC Routers Essays

- Fast PC Routers What's this all about. We're building IP routers out of PC's as tools for research and experimental network development. The goal of this work is to come up with an IP router platform which is completely open to bending, twisting, reprogramming, and the like, and yet has sufficient performance to be useful for experiments in the 1990's. Open routing platforms are an important tool for researchers developing new protocols and architectures. The DARTnet testbed, a precursor of this work, used routers built from Sun Sparcstations to catalyze the development of IP Multicast, RSVP, and the MBONE conferencing tools....   [tags: essays research papers]

Free Essays
1874 words (5.4 pages)

Wirelenss Mobile Networks: Design and Performance Essay

- Wireless networks become part of daily life. Day by day, every hotel, mall, cafe, restaurant etc. are covered by wireless internet zones. Not only laptop computers and PDAs are used to connect to wireless networks, but also some of the new mobile phones are also equipped with wireless network cards to connect to the wireless access points to get high-speed Internet access. In order to extend the limited range of wireless access points, multiple access points are deployed to the zones to compose wireless mesh networks....   [tags: Routers, Mesh, Internet]

Powerful Essays
696 words (2 pages)

Roles of Internet Service Providers Essay

- ... *Request comes in to translate, series of requests and responses are made, requestor accepts first response vulnerable for man-in-the-middle attack Provide authentic and authoritative routing information, uses BGP as a standard. *Vulnerability to international cyber hacking. *Report a compromised system *Comply with technical aspects of internet participation *Work with other ISP providers in the event of emergencies. Provide uninterrupted service to their providers. Provide authentic and authoritative naming information....   [tags: routers, protection, developers]

Powerful Essays
682 words (1.9 pages)

Essay on Router Comparison

- Connecting remote offices or home PC’s to the Internet and corporate networks can be troublesome, requiring a balance of bandwidth limitations, security concerns and firewall functionality. Simple setup is also a necessity, so less-experienced users can easily get these fairly complex systems up and running. In addition, the cost of communication hardware and software must be kept to a minimum to meet tight budgets. The routers also offer firewall protection for security, productivity and operational purposes....   [tags: essays research papers]

Free Essays
928 words (2.7 pages)