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while maintaining a degree of can achieve better overall routing
predictability. performance and more efficient use
(b) Efficient performance: These of network resources. Chapter Three: Advanced Computer Networks
algorithms aim for a sweet spot
between fast convergence (adapting Disadvantages
FOR ONLINE READING ONLY
quickly to changes) and optimal (a) Complexity: Hybrid algorithms
resource utilization (minimizing can be more complex to configure
bandwidth and processing and maintain compared to purely
overhead). adaptive or non-adaptive methods.
(c) Scalability: Hybrid routing
algorithms are often well-suited (b) Resource requirements: The
for larger, more complex networks increased complexity may demand
due to their ability to balance additional resources for processing
adaptability with stability. and management.

Example Routing Protocols

Enhanced Interior Gateway Routing Imagine a large company with offices in
Protocol (EIGRP): A prime example different cities. Each office has its own
of a hybrid routing algorithm, EIGRP network, but employees need to share
combines elements of distance-vector information across locations. Routing
and link-state protocols. This allows for protocols act like GPS for data packets,
relatively fast convergence times like as shown in Figure 3.12. This includes:
distance-vector protocols while offering
some of the advantages of link-state (a) Interior Gateway Protocols (IGP):
protocols, making it relatively easy to Used within a single organization’s
use. network, like local maps. Examples
are RIP and OSPF.

Advantages (b) Exterior Gateway Protocol (EGP):
(a) Stability and adaptability: Hybrid Used for communication between
algorithms provide a good balance different organizations, like
between these two desirable connecting a company’s network
characteristics, adapting to changes to the Internet.
without being overly sensitive to
network fluctuations. IGP
(b) Enhanced performance and IGP EGP
efficiency: By combining the
strengths of different routing
approaches, hybrid algorithms Figure 3.12: Gateway protocols

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Student’s Book Form Five

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