12-06-2012, 04:18 PM
ROUTER AND ROUTING
[attachment=24229]
INTRODUCTION
There are many different computing and networking technologies some available today, some just now emerging; some well-proven, some quite experimental. Understanding and solving today's computing dilemma more completely involves recognizing technologies; especially since a single technology by itself seldom suffices and, instead, multiple technologies are usually necessary. Some technologies are being obsolete, some are maturing, some are adequate, and some are vital.
This project describes the Router, its various types, the internal structure as well as the various functionalities of the Router. Router is a Layer 3 device. Therefore layer 3 security is managed through Router. Through this project various types of routing protocols are discussed. These routing protocols are the key for proper communication between routers. As Router is used as a device to establish a connection between different networks, these routing protocols are the methods used to communicate.
ROUTER
A Router is a device that connects two networks – frequently over large distances.
Routers have separate collision domain and separate broadcast domain for each port.
A Router is a programmable device that works with other routers ,via routing protocol to establish the best path ,to forward a packet with a given address.
Routers operate at least at 3rd layer ,the Network Layer ,of the OSI Reference Model.
FUNCTIONS OF ROUTER
Sends a packet of information from one network to
another network.
To route, builds routing table which contain-
The destination network and subnet mask
The next hop router to get to the destination network
Routing metrics and administrative distance
TYPES OF ROUTERS
1. ACCESS LAYER ROUTER
Located at customer sites such as branch offices that do not need hierarchical routing of information. Routers Series:1600,1700,1800
2. DISTRIBUTION LAYER ROUTER
Distribution routers aggregate traffic from multiple access routers, either at the same site, or to collect the data streams from multiple sites to a major enterprise location. Router Series:
2600,2800,3600
3. CORE LAYER ROUTER
Core router may provide a “Collapsed Backbone "interconnecting the distribution tier routers from multiple buildings of a campus, or large enterprise location.
Router Series: 7200,7600,10000
ADVANTAGES OF ROUTERS
Routers use logical addressing, they provide many advantages over bridges and switches, including:
Routers solve problems of broadcast .
Routers separate bandwidth and collision domains.
Routers allow you to connect different media types together, like Ethernet and Token Ring without any conversion issues.
Routers can switch packets on the same interface using VLANs.
[attachment=24229]
INTRODUCTION
There are many different computing and networking technologies some available today, some just now emerging; some well-proven, some quite experimental. Understanding and solving today's computing dilemma more completely involves recognizing technologies; especially since a single technology by itself seldom suffices and, instead, multiple technologies are usually necessary. Some technologies are being obsolete, some are maturing, some are adequate, and some are vital.
This project describes the Router, its various types, the internal structure as well as the various functionalities of the Router. Router is a Layer 3 device. Therefore layer 3 security is managed through Router. Through this project various types of routing protocols are discussed. These routing protocols are the key for proper communication between routers. As Router is used as a device to establish a connection between different networks, these routing protocols are the methods used to communicate.
ROUTER
A Router is a device that connects two networks – frequently over large distances.
Routers have separate collision domain and separate broadcast domain for each port.
A Router is a programmable device that works with other routers ,via routing protocol to establish the best path ,to forward a packet with a given address.
Routers operate at least at 3rd layer ,the Network Layer ,of the OSI Reference Model.
FUNCTIONS OF ROUTER
Sends a packet of information from one network to
another network.
To route, builds routing table which contain-
The destination network and subnet mask
The next hop router to get to the destination network
Routing metrics and administrative distance
TYPES OF ROUTERS
1. ACCESS LAYER ROUTER
Located at customer sites such as branch offices that do not need hierarchical routing of information. Routers Series:1600,1700,1800
2. DISTRIBUTION LAYER ROUTER
Distribution routers aggregate traffic from multiple access routers, either at the same site, or to collect the data streams from multiple sites to a major enterprise location. Router Series:
2600,2800,3600
3. CORE LAYER ROUTER
Core router may provide a “Collapsed Backbone "interconnecting the distribution tier routers from multiple buildings of a campus, or large enterprise location.
Router Series: 7200,7600,10000
ADVANTAGES OF ROUTERS
Routers use logical addressing, they provide many advantages over bridges and switches, including:
Routers solve problems of broadcast .
Routers separate bandwidth and collision domains.
Routers allow you to connect different media types together, like Ethernet and Token Ring without any conversion issues.
Routers can switch packets on the same interface using VLANs.