Router&Switch

OSI Reference Model and TCP/IP model

Ethernet Switch Operating Principle

Working Principle of Router

VLAN Principle/Feature and Configuration

Basic Principle and Configuration of SpanTreeProtocol

LACP Principle and Configuration

VRRP Principle and Configuration

DHCP Principle and Configuration

Port Mirroring Principle and Configuration

ZCTA：Candidates can obtain ZCTA certification after passing the Theory Exam.

ZCTA certificate is valid for 2 years.
Before the certificate expires, the certificate holder can pass the Theory Exam of the corresponding certification level to obtain the certificate again. The validity period of the recertification is the same as the original certificate.