At which layer of the OSI model are routing protocols defined?

The correct answer is A. Network. Routing protocols are defined at the network layer (Layer 3) of the OSI model. The network layer is responsible for routing packets across different networks using logical addresses (IP addresses). Routing protocols are used to exchange routing information between routers and to

Submitted by takeshi77· Apr 18, 2026Network Security

Question

Options

ANetwork
BPhysical
CTransport
DData Link

How the community answered

(49 responses)

A
88% (43)
B
6% (3)
C
4% (2)
D
2% (1)

Explanation

Routing protocols are defined at the network layer (Layer 3) of the OSI model. The network layer is responsible for routing packets across different networks using logical addresses (IP addresses). Routing protocols are used to exchange routing information between routers and to determine the best path for data delivery. Some examples of routing protocols are BGP, OSPF, RIP, and EIGRP. Palo Alto Networks devices support advanced routing features using the Advanced Routing Engine.

Topics

#OSI Model#Routing Protocols#Network Layer

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