Interlogix NS3550-2T-8S User Manual - Manual (Page 619)

IFS NS3552-8P-2S AND NS3550-2T-8S User Manual
619
HTTPS
HTTPS is an acronym for Hypertext Transfer Protocol over Secure Socket Layer. It is used to indicate a secure HTTP
connection.
HTTPS provide authentication and encrypted communication and is widely used on the World Wide Web for
security-sensitive communication such as payment transactions and corporate logons.
HTTPS is really just the use of Netscape's Secure Socket Layer (SSL) as a sublayer under its regular HTTP application
layering. (HTTPS uses port 443 instead of HTTP port 80 in its interactions with the lower layer, TCP/IP.) SSL uses a
40-bit key size for the RC4 stream encryption algorithm, which is considered an adequate degree of encryption for
commercial exchange.
I
ICMP
ICMP is an acronym for Internet Control Message Protocol. It is a protocol that generated the error response, diagnostic
or routing purposes. ICMP messages generally contain information about routing difficulties or simple exchanges such
as time-stamp or echo transactions. For example, the PING command uses ICMP to test an Internet connection.
IEEE 802.1X
IEEE 802.1X is an IEEE standard for port-based Network Access Control. It provides authentication to devices attached
to a LAN port, establishing a point-to-point connection or preventing access from that port if authentication fails. With
802.1X, access to all switch ports can be centrally controlled from a server, which means that authorized users can use
the same credentials for authentication from any point within the network.
IGMP
IGMP is an acronym for Internet Group Management Protocol. It is a communications protocol used to manage the
membership of Internet Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast routers to establish
multicast group memberships. It is an integral part of the IP multicast specification, like ICMP for unicast connections.
IGMP can be used for online video and gaming, and allows more efficient use of resources when supporting these uses.
IGMP Querier
A router sends IGMP Query messages onto a particular link. This router is called the Querier.
IMAP
IMAP is an acronym for Internet Message Access Protocol. It is a protocol for email clients to retrieve email messages
from a mail server.
IMAP is the protocol that IMAP clients use to communicate with the servers, and SMTP is the protocol used to transport
mail to an IMAP server.