RIP — TechKnowSurge

About this video

Routing Information Protocol (RIP) is one of the oldest distance-vector routing protocols still referenced in networking curricula and professional certification exams. It operates by having each Layer 3 device, whether a router or a Layer 3 switch, periodically broadcast its routing table to directly connected neighbors. Each route entry carries a hop count that reflects how many routers a packet must cross to reach a given network, and that count is incremented by one each time the route is passed along to the next device. RIP version 2 builds on the original standard by supporting classless routing and subnet mask information within its updates. The convergence process unfolds across multiple rounds of route advertisement. In the first round, each device shares only the networks it knows directly. By the second and third rounds, routes learned from neighbors are re-advertised further into the topology with updated hop counts, gradually filling in the routing tables of devices that are farther away. Once no device receives any new or changed route information, the network is considered fully converged, meaning every Layer 3 device holds accurate paths to all known networks. After convergence, packet forwarding becomes a straightforward lookup process. A device examines its routing table, identifies the next hop toward the destination network, and forwards the packet accordingly. Each subsequent router repeats this process until the packet reaches a device for which the destination is a directly connected network. RIP enforces a maximum hop count of 15 to prevent routing loops, making it best suited for smaller networks where paths between any two points remain within that limit.

What you'll learn

Explain how RIP uses distance-vector hop-count increments to propagate routing table entries across multiple routers until full network convergence is achieved
Describe the round-by-round RIP convergence process, including how routers exchange routing tables and update hop counts through each iteration

What's covered

Routing Information Protocol (RIP)

RIP Overview
- Distance Vector Protocol
- RIP Version 2
- Exam Relevance
Network Topology
- Layer 3 Switch
- Three Routers Connected
- Directly Connected Networks
RIP Convergence Rounds
- Round 1 Initial Updates
  - Hop Count Increments
  - Routing Tables Exchanged
- Round 2 Propagation
  - Hop Count Increases
  - Routes Forwarded Onward
- Round 3 Full Convergence
  - All Networks Known
  - Fully Converged Network
Packet Forwarding Process
- Routing Table Lookup
- Hop-by-Hop Forwarding
- Return Path to Source

Aligned to

Cisco CCNA

3.1 Interpret the components of routing table

3.2 Determine how a router makes a forwarding decision by default

Key terms

Routing Information Protocol: One of the oldest distance-vector routing protocols, using hop count as its sole routing metric with a maximum of 15 hops to prevent routing loops. RIP sends full routing table updates periodically and converges slowly compared to modern protocols, making it suitable only for small networks.
Router: A network device that forwards data packets between networks based on IP addresses.
Routing Protocol: A protocol used by routers to communicate and share routing information to determine the best path for data.
Distance Vector: A type of routing algorithm where each router periodically shares its entire routing table with directly connected neighbors, calculating the best path based on a distance metric such as hop count. Distance vector protocols such as RIP converge more slowly than link-state protocols but are simpler to configure.
Hop Count: A metric used by distance vector protocols that counts the number of routers a packet must pass through to reach its destination.
Network Convergence: The state in which all routers in a network have consistent and complete routing information about every reachable network.

Topics

Routing Protocols Distance Vector Routing Rip Hop Count Network Convergence Networking

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