Interlogix NS3552-8P-2S-V2, User Manual

Page: 500 / 511

Glossary
498 NS3552-8P-2S-V2 User Manual
HTTPS Hypertext Transfer Protocol over Secure Socket Layer. It is
used to indicate a secure HTTP connection.
HTTPS provides 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 the use of 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
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 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 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.
The current version of the IMAP is IMAP4. It is similar to Post
Office Protocol version 3 (POP3), but offers additional and
more complex features. For example, the IMAP4 protocol
leaves email messages on the server rather than downloading
them to a computer. To remove your messages from the
server, use the mail client to generate local folders, copy
messages to the local hard drive, and then delete and expunge
the messages from the server.