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GigaX2008EX L2 Managed Switch User Manual
IGMP
Internet Group Management Protocol
An Internet protocol that enables a computer to share
information about its membership in multicast groups with
adjacent routers. A multicast group of computers is one
whose members have designated as interested in receiving
specific content from the others. Multicasting to an IGMP
group can be used to simultaneously update the address
books of a group of mobile computer users or to send
company newsletters to a distribution list.
IGMP Snooping
Snoop the IGMP packets on each port and associate the port
with a layer 2 muticast group.
mask
See network mask.
Multicast
To send data to a group of network devices.
Mbps
Abbreviation for Megabits per second, or one million bits per
second. Network data rates are often expressed in Mbps.
Monitor
Also called “Roving Analysis”, allow you to attach a network
analyzer to one port and use it to monitor the traffics of other
ports on the switch.
network mask
A network mask is a sequence of bits applied to an IP
address to select the network ID while ignoring the host
ID. Bits set to 1 mean “select this bit” while bits set to 0
mean “ignore this bit.” For example, if the network mask
255.255.255.0 is applied to the IP address 100.10.50.1, the
network ID is 100.10.50, and the host ID is 1. See also binary,
IP address, subnet, “IP Addresses Explained” section.
NIC
Network Interface Card
An adapter card that plugs into your computer and provides
the physical interface to your network cabling, which for
Ethernet NICs is typically an RJ-45 connector. See Ethernet,
RJ-45.
packet
Data transmitted on a network consists of units called
packets. Each packet contains a payload (the data), plus
overhead information such as where it came from (source
address) and where it should go (destination address).
ping
Packet Internet (or Inter-Network) Groper
A program used to verify whether the host associated with
an IP address is online. It can also be used to reveal the IP
address for a given domain name.
