Most of the details on this article are based on the definitions in the RFC 5245:
Request Timestamps: The timestamp shows when the address first and last appeared in the session.
Local or Remote address Port/Protocol: IP address and port of the local or remote endpoint. The combination of the local ip, port and the remote ip, port is called the candidate pair.
- Host Candidate (host): A candidate obtained by binding to a specific port
from an IP address on the host. This includes IP addresses on
physical interfaces and logical ones, such as ones obtained
through Virtual Private Networks (VPNs) and Realm Specific IP
(RSIP) [RFC3102] (which lives at the operating system level).
- Server Reflexive Candidate (srflx): A candidate whose IP address and port
are a binding allocated by a NAT for an agent when it sent a
packet through the NAT to a server. Server reflexive candidates
can be learned by STUN servers using the Binding request, or TURN
servers, which provides both a relayed and server reflexive
- Peer Reflexive Candidate (prflx): A candidate whose IP address and port are
a binding allocated by a NAT for an agent when it sent a STUN
Binding request through the NAT to its peer.
- Relayed Candidate (relay): A candidate obtained by sending a TURN Allocate
request from a host candidate to a TURN server. The relayed
candidate is resident on the TURN server, and the TURN server
relays packets back towards the agent.
Network Type: The type of network interface used by the base of a local candidate. It can be cellular, wifi, vpn, unknown.
Status of the candidate pair
- Nominated: This represents the IP addresses may be selected for sending and receiving media.
- Priority: Represents the priority of using the candidate pair based on the candidate type. Lower priority is preferred.
- State: Represents the state of the checklist for the local and remote candidates in a pair.
Metrics of the candidate pair
- RTT (sec): Represents the last measured round trip time.
- Bitrate Out: Represents the available bitrate for all the streams using this candidate pair. The bitrate is measured in bits per second and the bitrate is calculated over a 1 second window.
- Bytes Sent: Bytes sent on the candidate pair.
- Bytes Received: Bytes received on the candidate pair
- STUN Keep alive interval (sec): represents the interval of the STUN packets that keep the NAT bindings open.