Cisco Certified Network Associate (CCNA) Practice Exam

Disable ads (and more) with a membership for a one time $4.99 payment

Prepare for the Cisco Certified Network Associate (CCNA) Practice Exam. Test your knowledge with our interactive quizzes featuring multiple choice questions, hints, and explanations. Equip yourself for success!

Practice this question and more.

If you want to match SNMP traffic in an ACL, which transport layer protocol should you use?

UDP
TCP
ICMP
SCTP

The correct answer is: UDP

The correct transport layer protocol to match Simple Network Management Protocol (SNMP) traffic in an ACL (Access Control List) is UDP (User Datagram Protocol). SNMP primarily operates over UDP, specifically using ports 161 and 162 for different functionalities – 161 for general SNMP messages and 162 for SNMP traps. Using UDP is necessary because SNMP relies on the connectionless nature of UDP, which is suited for the exchange of small packets of data typical of network management tasks. This protocol allows SNMP to function efficiently without the overhead of establishing and maintaining a connection, which is crucial in a network management scenario where timely data collection and monitoring are essential. The other transport layer protocols mentioned do not apply to SNMP. TCP (Transmission Control Protocol) is connection-oriented and not used by SNMP. ICMP (Internet Control Message Protocol) is primarily used for error messages and operational information in network diagnostics and does not facilitate SNMP traffic. SCTP (Stream Control Transmission Protocol) is another transport protocol but is not associated with SNMP operations. Therefore, matching SNMP traffic in an ACL would necessitate the use of UDP.