datalink layar
Data Link Layer
IP, AppleTalk, IPX
• tests Layer 2 connectivity • enabled by default on each interface • provides information on directly connected devices that have CDP enabled
datalink layer
CDP
Network layer
TCP operates at transport layer
1. It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP. 2. It allows systems to learn about each other even if different network layer protocols are configured.
None, they communicate to the layer 7, however they do not operate at that layer(application)
The show cdp interface command in Cisco devices displays information about the interfaces on which Cisco Discovery Protocol (CDP) is enabled. It provides details such as the interface status, the CDP hold time, and the timeout interval. This command is useful for network administrators to verify CDP operation and understand which interfaces are actively participating in CDP neighbor discovery.
generally layer 4, but SOCKS operates at layer 5, which allows it to work well with applications
IGMP