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
None, they communicate to the layer 7, however they do not operate at that layer(application)
IGMP
generally layer 4, but SOCKS operates at layer 5, which allows it to work well with applications
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.
TELNET