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MTU Maximum transmission unit. Maximum packet size, in bytes, that a particular interface can handle.

multicast Single packets copied by the network and sent to a specific subset of network addresses. These addresses are specified in the destination address field.

multicast address Single address that refers to multiple network devices. Synonymous with group address.

multicast group Dynamically determined group of IP hosts identified by a single IP multicast address.

Λέξεις κλειδιά: multicast

multicast router Router used to send IGMP query messages on their attached local networks. Host members of a multicast group respond to a query by sending IGMP reports noting the multicast groups to which they belong. The multicast router takes responsibility for forwarding multicast datagrams from one multicast group to all other networks that have members in the group.

multicast server Establishes a one-to-many connection to each device in a VLAN, thus establishing a broadcast domain for each VLAN segment. The multicast server forwards incoming broadcasts only to the multicast address that maps to the broadcast address.

Λέξεις κλειδιά: multicast

multihomed host Host attached to multiple physical network segments in an OSI CLNS network.

multilayer switch Switch that filters and forwards packets based on MAC addresses and network addresses. A subset of LAN switch.

Λέξεις κλειδιά: switch

multiplexing cheme that allows multiple logical signals to be transmitted simultaneously across a single physical channel.

Λέξεις κλειδιά: multiplexing

NIC Network interface card. Board that provides network communication capabilities to and from a computer system. Also called an adapter.

ping Short for Packet Internet Groper or Packet Inter-network Groper, a utility to determine whether a specific IP address is accessible. It works by sending a packet to the specified address and waiting for a reply. PING is used primarily to troubleshoot Internet connections.

Λέξεις κλειδιά: icmpechoreplyrtt

store and forward packet switching Packet-switching technique in which frames are completely processed before being forwarded out the appropriate port. This processing includes calculating the CRC and checking the destination address. In addition, frames must be temporarily stored until network resources (such as an unused link) are available to forward the message. Contrast with cut-through packet switching.

subnet mask 32-bit address mask used in IP to indicate the bits of an IP address that are being used for the subnet address. Sometimes referred to simply as mask.

Λέξεις κλειδιά: mask

subnetwork In IP networks, a network sharing a particular subnet address. Subnetworks are networks arbitrarily segmented by a network administrator in order to provide a multilevel, hierarchical routing structure while shielding the subnetwork from the addressing complexity of attached networks. Sometimes called a subnet.

Λέξεις κλειδιά: subnet

switch Network device that filters, forwards, and floods frames based on the destination address of each frame. The switch operates at the data link layer of the OSI model.

Λέξεις κλειδιά: hublan

T1 Digital WAN carrier facility. T1 transmits DS-1-formatted data at 1.544 Mbps through the telephone-switching network, using AMI or B8ZS coding. Compare with E1.

Λέξεις κλειδιά: network

T3 Digital WAN carrier facility. T3 transmits DS-3-formatted data at 44.736 Mbps through the telephone switching network. Compare with E3.

TCP/IP Transmission Control Protocol/Internet Protocol. Common name for the suite of protocols developed by the U.S. DoD in the 1970s to support the construction of worldwide internetworks. TCP and IP are the two best-known protocols in the suite.

TDM Time-division multiplexing. Technique in which information from multiple channels can be allocated bandwidth on a single wire based on preassigned time slots. Bandwidth is allocated to each channel regardless of whether the station has data to transmit.

Λέξεις κλειδιά: multiplexing

telco Abbreviation for telephone company.

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