In the Open Systems Interconnect (OSI) Reference Model, at what level are TCP and UDP provided?

The correct answer is A. Transport. The Answer: Transport. The Layer 4 Transport layer supports the TCP and UDP protocols in the OSI Reference Model. This layer creates an end-to-end transportation between peer hosts. The transmission can be connectionless and unreliable such as UDP, or connection- oriented and ens

Submitted by emma.c· Apr 18, 2026Network and Communications Security

Question

Options

ATransport
BNetwork
CPresentation
DApplication

How the community answered

(43 responses)

A
93% (40)
B
2% (1)
D
5% (2)

Explanation

The Answer: Transport. The Layer 4 Transport layer supports the TCP and UDP protocols in the OSI Reference Model. This layer creates an end-to-end transportation between peer hosts. The transmission can be connectionless and unreliable such as UDP, or connection- oriented and ensure error-free delivery such as TCP. The following answers are incorrect: Network. The Network layer moves information between hosts that are not physically connected. It deals with routing of information. IP is a protocol that is used in Network Layer. TCP and UDP do not reside at the Layer 3 Network Layer in the OSI Reference Model. Presentation. The Presentation Layer is concerned with the formatting of data into a standard presentation such as ASCII. TCP and UDP do not reside at the Layer 6 Presentation Layer in the OSI Reference Application. The Application Layer is a service for applications and Operating Systems data transmission, for example HTTP, FTP and SMTP. TCP and UDP do not reside at the Layer 7 Application Layer in the OSI Reference Model.

Topics

#OSI Model#TCP/UDP#Transport Layer#Networking Protocols

Community Discussion

No community discussion yet for this question.

Full SSCP Practice