chapter 3 :Dynamic Routing

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chapter 3 :Dynamic Routing by Mind Map: chapter 3 :Dynamic Routing

1. Dynamic Routing Protocol overview

1.1. Dynamic Routing Protocol Evolution

1.2. - Dynamic routing protocols have been used in networks since the late 1980s. - Newer versions support the communication based on IPv6.

2. Dynamic Routing Protocol Components

2.1. - A routing protocol is a set of processes, algorithms, and messages that are used to exchange routing information and populate the routing table with the routing protocol's choice of best paths.

2.2. The main components of dynamic routing protocols include: 1. Data structures - Routing protocols typically use tables or databases for its operations. This information is kept in RAM. 2.Routing protocol messages - Routing protocols use various types of messages to discover neighboring routers, exchange routing information, and other tasks to learn and maintain accurate information about the network. 3.Algorithm - An algorithm is a finite list of steps used to accomplish a task. Routing protocols use algorithms for facilitating routing information and for best path determination.

3. Dynamic versus static routing.

3.1. - network professionals use static routing. Dynamic routing certainly has several advantages over static routing; however, static routing is still used in networks today. In fact, networks typically use a combination of both static and dynamic routing.

3.2. Static routing has several primary uses, including: 1. Providing ease of routing table maintenance in smaller networks that are not expected to grow significantly. 2. Routing to and from a stub network, which is a network with only one default route out and no knowledge of any remote networks. 3. Accessing a single default route (which is used to represent a path to any network that does not have a more specific match with another route in the routing table).

3.3. Static Routing Advantages and Disadvantages

3.3.1. Advantages

3.3.1.1. • Easy to implement in a small network. • Very secure. No advertisements are sent, unlike with dynamic routing protocols. • It is very predictable, as the route to the destination is always the same. • No routing algorithm or update mechanisms are required. Therefore, extra resources (CPU and memory) are not required.

3.3.2. Disadvantages

3.3.2.1. • Suitable for simple topologies or for special purposes such as a default static route. • Configuration complexity increases dramatically as the network grows. Managing the static configurations in large networks can become time consuming. • If a link fails, a static route cannot reroute traffic. Therefore, manual intervention is required to re-route traffic.

4. Dynamic Routing Protocols Uses

4.1. Dynamic routing protocols help the network administrator manage the time-consuming and exacting process of configuring and maintaining static routes.

4.2. Dynamic Routing Advantages and Disadvantages

4.2.1. Advantages

4.2.1.1. • Suitable in all topologies where multiple routers are required. • Generally independent of the network size. • Automatically adapts topology to reroute traffic if possible.

4.2.2. Disadvantages

4.2.2.1. • Can be more complex to initially implement. • Less secure due to the broadcast and multicast routing updates. Additional configuration settings such as passive interfaces and routing protocol authentication are required to increase security. • Route depends on the current topology. • Requires additional resources such as CPU, memory, and link bandwidth.