Interlogix IFS NS3502-8P-2S, Руководство пользователя

Страница: 553 / 568

IFS NS3502-8P-2S User Manual
553
DoS is an acronym for D enial of S ervice. In a denial-of-service (DoS) attack, an attacker attempts
to prevent legitimate users from accessing information or services. By targeting at network sites
or network connection, an attacker may be able to prevent network users from accessing email,
web sites, online accounts (banking, etc.), or other services that rely on the affected computer.
Dotted Decimal Notation
Dotted Decimal Notation refers to a method of writing IP addresses using decimal numbers and
dots as separators between octets.
An IPv4 dotted decimal address has the form x.y.z.w, where x, y, z, and w are decimal numbers
between 0 and 255.
DSCP
DSCP is an acronym for D ifferentiated S ervices C ode P oint. It is a field in the header of IP
packets for packet classification purposes.
E
EEE
EEE is an abbreviation for Energy Efficient Ethernet defined in IEEE 802.3az.
EPS
EPS is an abbreviation for Ethernet Protection Switching defined in ITU/T G.8031.
Ethernet Type
Ethernet Type, or EtherType, is a field in the Ethernet MAC header, defined by the Ethernet
networking standard. It is used to indicate which protocol is being transported in an Ethernet
frame.
F
FTP
FTP is an acronym for F ile T ransfer P rotocol. It is a transfer protocol that uses the Transmission
Control Protocol (TCP) and provides file writing and reading. It also provides directory service
and security features.
Fast Leave
IGMP snooping Fast Leave processing allows the switch to remove an interface from the
forwarding-table entry without first sending out group specific queries to the interface. The
VLAN interface is pruned from the multicast tree for the multicast group specified in the original
leave message. Fast-leave processing ensures optimal bandwidth management for all hosts on a
switched network, even when multiple multicast groups are in use simultaneously.
H