1. Which protocol is used to gather information about Cisco devices which share the same data link?
Explanation: Cisco Discovery Protocol (CDP) is a Cisco proprietary Layer 2 protocol that is enabled by default and used to gather information about Cisco devices.
2. Which protocol works with network devices, such as routers, switches, and wireless LAN access points across multiple manufacturers’ devices?
Explanation: LLDP is a vendor-neutral neighbor discovery protocol that advertises identity and capabilities of a device and receives the information from other physically-connected Layer 2 devices.