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Lowest abstraction layer in the Internet protocol suite
networking, the link layer is the lowest layer in the Internet protocol suite, the networking architecture of the Internet. The link layer is the group of
Link_layer
OSI model layer for node-to-node data transfer
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers
Data_link_layer
Protocol used by network devices for advertising their identity
The Link Layer Discovery Protocol (LLDP) is a link-layer protocol used by network devices for advertising their identity, capabilities, and neighbors on
Link_Layer_Discovery_Protocol
Framework for communication protocols used in IP networking
the layers are the link layer, containing communication methods for data that remains within a single network segment (link); the internet layer, providing
Internet_protocol_suite
Reference model for network communication
communication system are distinguished in seven abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
OSI_model
OSI model layer for physical data transmission
In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer: the layer most closely associated with
Physical_layer
LattisNet LocalTalk L2F Layer 2 Forwarding Protocol L2TP Layer 2 Tunneling Protocol LLDP Link Layer Discovery Protocol LLDP-MED Link Layer Discovery Protocol
List of network protocols (OSI model)
List_of_network_protocols_(OSI_model)
Layer for end-to-end network communication
In computer networking, the transport layer is an abstraction layer in a network protocol stack that provides communication services between applications
Transport_layer
Topics referred to by the same term
animated cat Link layer in computer networking ln (Unix), command-line program to create a link to a file Chainlink (blockchain), a cryptocurrency Link (Indonesia)
Link
OSI model layer for packet routing
In the seven-layer OSI model of computer networking, the network layer is layer 3. The network layer is responsible for packet forwarding including routing
Network_layer
Transmission of data at irregular intervals
modems older than V.2. Asynchronous communication at the data link layer or higher protocol layers is known as statistical multiplexing, for example Asynchronous
Asynchronous_communication
Highest layer in network protocol models
An application layer is an abstraction layer that specifies the shared communication protocols and interface methods used by hosts in a communications
Application_layer
Unit of data on an Ethernet network
link layer protocol data unit and uses the underlying Ethernet physical layer transport mechanisms. In other words, a data unit on an Ethernet link transports
Ethernet_frame
Proprietary link layer protocol by Microsoft
Link Layer Topology Discovery (LLTD) is a proprietary link layer protocol for network topology discovery and quality of service diagnostics. Microsoft
Link_Layer_Topology_Discovery
hostless system, directly to the Link Manager/ACL link. L2CAP's functions include: Multiplexing data between different higher layer protocols. Segmentation and
List_of_Bluetooth_protocols
Computer expansion bus standard
PCI Express is a layered protocol, consisting of a transaction layer, a data link layer, and a physical layer. The Data Link Layer is subdivided to include
PCI_Express
Communications protocol
exchange broadcast (slave-to-slave communication) The data link layer FDL (Field bus Data Link) servicesand protocols work with a hybrid access method that
Profibus
Radio communication link
communication link between the two stations in mobile or wireless communication. The air interface involves both the physical and data link layers (layer 1 and
Air_interface
Sublayer of the Open Systems Interconnection model
the logical link control (LLC) data communication protocol layer is the upper sublayer of the data link layer (layer 2) of the seven-layer OSI model. The
Logical_link_control
Network protocol
Technical Overview Define the OSI seven-layer architecture model the physical layer, data link layer and application layer Network in addition to the signal
DeviceNet
2-wire serial data and power interface
eBUS specifications – physical layer / data-link layer V.1.3.1 (March 2007) Archived eBUS specifications – application layer V1.6.1 (March 2007) Archived
EBUS_(serial_buses)
Network protocol for industrial automation
strictly scheduled and highly deterministic. Due to the unique physical layer, common network sniffers such as Wireshark cannot be used to sniff ControlNet
ControlNet
Dynamic table that maps network addresses to ports
table. At the data link layer, a FIB is most notably used to facilitate Ethernet bridging based on MAC addresses. Other data-link-layer technologies using
Forwarding_information_base
Information exchange standards
application level. Each layer receives information from the layer above, processes it and passes it down to the next layer. Each layer adds encapsulation information
OSI_protocols
Security vulnerabilities of the network interface layer
The link layer is the lowest layer in the TCP/IP model. It is also referred to as the network interface layer and mostly equivalent to the data link layer
Link_layer_security
Group of internetworking methods in the TCP/IP suite
the link types. Such protocols belong to the link layer. Internet-layer protocols use IP-based packets. A common design aspect in the internet layer is
Internet_layer
Overview of and topical guide to the Internet
Internet standard – Request for Comments (RFC) – Internet protocol suite – Link layer – Address Resolution Protocol (ARP/InARP) – Neighbor Discovery Protocol
Outline_of_the_Internet
Service layer in IEEE 802 network standards
logical link control (LLC) sublayer together make up the data link layer. The LLC provides flow control and multiplexing for the logical link (i.e. EtherType
Medium_access_control
Communications technology
band used can be selected from among standardized patterns. The data link layer manages quality of service and other control functions using control frames
Nessum
Associates addresses in the layers of a networked device implementation
communication protocol for discovering the link layer address, such as a MAC address, associated with an internet layer address, typically an IPv4 address. The
Address_Resolution_Protocol
OSI model layer for communication sessions
In the seven-layer OSI model of computer networking, the session layer is layer 5. The session layer provides the mechanism for opening, closing and managing
Session_layer
IL2P (Improved Layer 2 Protocol) is a data link layer protocol originally derived from layer 2 of the X.25 protocol suite and designed for use by amateur
Improved_Layer_2_Protocol
OSI model layer for data translation
In the seven-layer OSI model of computer networking, the presentation layer is layer 6 and serves as the data translator for the network. It is sometimes
Presentation_layer
Using multiple network connections in parallel to increase capacity and reliability
that combine multiple frequency bands. OSI layer 2 (data link layer, e.g. Ethernet frame in LANs or multi-link PPP in WANs, Ethernet MAC address) aggregation
Link_aggregation
Spacecraft communications network
electronics. SpaceWire replaced old PECL differential drivers in the physical layer of IEEE 1355 DS-DE by low-voltage differential signaling (LVDS). SpaceWire
SpaceWire
Data link layer communication protocol
In computer networking, Point-to-Point Protocol (PPP) is a data link layer (layer 2) communication protocol between two routers directly without any host
Point-to-Point_Protocol
Processor interconnect developed by Intel
is the 80-bit flit, which has 8 bits for error detection, 8 bits for "link-layer header", and 64 bits for data. One 80-bit flit is transferred in two clock
Intel_QuickPath_Interconnect
Topics referred to by the same term
Look up layer or layers in Wiktionary, the free dictionary. Layer or layered may refer to: Layers (Kungs album) Layers (Les McCann album) Layers (Royce
Layer
Network routing scheme based on labels identifying paths
operates at a layer between traditional definitions of OSI Layer 2 (data link layer) and Layer 3 (network layer), and is often referred to as a layer 2.5 protocol
Multiprotocol_Label_Switching
Protocol for statefully assigning IPv6 addresses on an IPv6 network
January 2000, modulo 2³²) link-layer address The time component reduces the likelihood of collisions if the same link-layer address is reused on another
DHCPv6
Network communications domain that is isolated at the data link layer
in a virtual network at the data link layer (OSI layer 2). A VLAN behaves like a virtual network switch or network link that can share the same physical
VLAN
Application-level throughput of a network
layer, network layer and sometimes data link layer protocol overhead is included in the throughput, but is excluded from the goodput. Transport layer
Goodput
Standard for vehicle-to-grid communications
15118-10: Physical layer and data link layer requirements for single-pair Ethernet ISO 15118-11: Physical layer and data link layer requirements for single-pair
ISO_15118
Application running at the network layer and above
networking, a network service is an application running at the network layer and above, that provides data storage, manipulation, presentation, communication
Network_service
Detection of half-working Ethernet links
Unidirectional Link Detection (UDLD) is a data link layer protocol from Cisco Systems to monitor the physical configuration of cables and detect unidirectional
Unidirectional_Link_Detection
Computer networking technique
the group. Network assisted multicast may be implemented at the data link layer using one-to-many addressing and switching such as Ethernet multicast
Multicast
Ethernet protocol
(commonly known as RJ45) and M12 are accepted. The standard Ethernet data link layer is extended by an additional bus scheduling mechanism, which guarantees
Ethernet_Powerlink
Protocol in the Internet protocol suite used with IPv6
nodes to determine and advertise an IPv6 address corresponding to a given link-layer address, similar to Inverse ARP for IPv4. The Secure Neighbor Discovery
Neighbor_Discovery_Protocol
Unique identifier assigned to network interfaces
addresses are used in the medium access control protocol sublayer of the data link layer. As typically represented, MAC addresses are recognizable as six groups
MAC_address
System for exchanging messages between computing systems
reported to the network layer. The exchange of data link units (including flow control) is defined by this layer. The physical layer describes details like
Communication_protocol
Standard for serial communication between devices without host computer
link layer, and ISO 11898-2 which covers the CAN physical layer for high-speed CAN. ISO 11898-3 was released later and covers the CAN physical layer for
CAN_bus
Open standard family of wired computer networking protocols
higher-layer protocols trigger retransmission of lost frames. Per the OSI model, Ethernet provides services up to and including the data link layer. The
Ethernet
Smallest message entity exchanged using Internet Protocol version 6
segment of the higher-level transport layer protocol, but may be data for an internet layer (e.g., ICMPv6) or link layer (e.g., OSPF) instead. IPv6 packets
IPv6_packet
Size of largest allowed packet on a network segment
network layer transaction. The MTU relates to, but is not identical to the maximum frame size that can be transported on the data link layer, e.g., Ethernet
Maximum_transmission_unit
consists of link layer and application layer formats. DF1 works over half duplex and full duplex modes of communication. Application layer message format
DF-1_Protocol
Logical identifier addressing a specific group of devices on a network
addressing can be used in the link layer (layer 2 in the OSI model), such as Ethernet multicast, and at the internet layer (layer 3 for OSI) for Internet Protocol
Multicast_address
Section of a computer network in which all nodes can broadcast to each other
network, in which all nodes can reach each other by broadcast at the data link layer. A broadcast domain can be within the same LAN segment or it can be bridged
Broadcast_domain
Standard for computer networking over a cable television system
options available at Open Systems Interconnection (OSI) layers 1 and 2—the physical and data link layers. Channel width: Downstream: All versions of DOCSIS
DOCSIS
IEEE standards for local and metropolitan area networks
the OSI data link layer into two sub-layers: logical link control (LLC) and medium access control (MAC), as follows: Data link layer LLC sublayer MAC sublayer
IEEE_802
Open standard processor interconnection for data centers
protocols operate with a common link/transaction layer, which is separate from the CXL.io protocol link and transaction layer. CXL.cache and CXL.mem transmit
Compute_Express_Link
ISBN 978-0-470-17560-6. CCNA Exploration 4.0 5.0 Routing Protocols and Concepts Student Lab Manual. Cisco Press. The ISO model is used for layer names.
List of information technology initialisms
List_of_information_technology_initialisms
Large packets in IPv6
internet-layer packet exceeding the standard maximum transmission unit (MTU) of the underlying network technology. In contrast, large packets for link-layer technologies
Jumbogram
Network that allows computers to share resources and communicate with each other
generally function at the lower three layers of the OSI model: the physical layer, the data link layer, and the network layer. A global area network (GAN) is
Computer_network
between the protocol stack and the adapter driver. It resides in Layer 2, the Data Link layer, of the OSI model. This interface also enables one or more network
Open_Data-Link_Interface
Unit of information transmitted over a computer network
are: The Layer 4: transport layer PDU is the segment. The Layer 3: network layer PDU is the packet or the datagram. The Layer 2: data link layer PDU is
Protocol_data_unit
Interface technology communication architecture
UniPro, the OSI Physical Layer is split into two sublayers: Layer 1 (the actual physical layer) and Layer 1.5 (the PHY Adapter layer) which abstracts from
UniPro_protocol_stack
Electrical or optical connectors for carrying audio and video signals
can be thought of as defining the physical layer, data link layer, and most or all of the application layer. For analog audio and analog video these functions
Audio and video interfaces and connectors
Audio_and_video_interfaces_and_connectors
Link layer communications protocol
The Aurora Protocol is a link layer communications protocol for use on point-to-point serial links. Developed by Xilinx, it is intended for use in high-speed
Aurora_(protocol)
control (MAC) layer requests certain services from the physical layer. Service access points are also used in IEEE 802.2 Logical Link Control in Ethernet
Service_Access_Point
Computer networking protocol
widely-deployed protocol for establishing a data link layer connection over an unreliable, point-to-point data link. L2TP provides a mechanism to multiplex and
Layer_2_Tunneling_Protocol
Amateur radio data communications protocol
AX.25 (Amateur X.25) is a data link layer protocol originally derived from layer 2 of the X.25 protocol suite and designed for use by amateur radio operators
AX.25
Network protocol
Ethernet link layer protocol and hence allows communication between any two hosts in the same Ethernet broadcast domain. RoCE v2 is an internet layer protocol
RDMA_over_Converged_Ethernet
Device or point within a network capable of creating, receiving, or transmitting data
area network (WAN), every LAN or WAN node that participates on the data link layer must have a network address, typically one for each network interface
Node_(computer_networking)
Communication protocol property
delivered in order. Although the lower-layer switching is connectionless, or it may be a data link layer or network layer switching mode, where all data packets
Connection-oriented communication
Connection-oriented_communication
Interface to data link layers on a Unix-like system
operating system level. It provides a raw interface to data link layers, permitting raw link-layer packets to be sent and received, and allows a userspace
Berkeley_Packet_Filter
Group of all devices on the same wireless network
A service set forms a logical network of nodes operating with shared link-layer networking parameters; they form one logical network segment. A service
Service_set_(802.11_network)
Technical standard
LVDS is a physical layer specification only; many data communication standards and applications use it and add a data link layer as defined in the OSI
Low-voltage differential signaling
Low-voltage_differential_signaling
Electrical or optical properties between network devices
MAC layer and the logical link layer. An implementation of a specific physical layer is commonly referred to as PHY. The Ethernet physical layer has evolved
Ethernet_physical_layer
Protocol (DCP) is a protocol definition within the PROFINET context. It is a link layer based protocol to configure station names and IP addresses. It is restricted
Discovery and Configuration Protocol
Discovery_and_Configuration_Protocol
Proprietary data link network protocol
Cisco Discovery Protocol (CDP) is a proprietary data link layer protocol developed by Cisco Systems in 1994 by Keith McCloghrie and Dino Farinacci. It
Cisco_Discovery_Protocol
Field in Ethernet frames indicating which protocol is encapsulated in the payload
the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed. The same field is also used
EtherType
Network switch providing functionality above the data link layer
Multi-layer switching can make routing and switching decisions based on the following MAC address in a data link frame Protocol field in the data link frame
Multilayer_switch
remote devices. NCP provided services comparable to the data link layer and Network Layer functions in the OSI model of a Wide area network. The original
IBM_Network_Control_Program
Means of addressing all devices on a network with a single transmission
single device. For network layer communications, a broadcast address may be a specific IP address. At the data link layer on Ethernet networks, it is
Broadcast_address
Theoratical maximum speed of a network connection
standard provides at a reference point between the physical layer and the data link layer. The wire speed should not be confused with the line bitrate
Wire_speed
Network routing decisions based on labels placed in packets
as traditional layer 3 hop-by-hop routing). Here, the switching of network packets occurs at a lower level, namely the data link layer rather than the
Label_switching
Obsolete computer networking protocol
(IPv4) address from a computer network, when all it has available is its link-layer or hardware address, such as a MAC address. The client broadcasts the
Reverse Address Resolution Protocol
Reverse_Address_Resolution_Protocol
the maximum time which may elapse between two Link Layer data packets having been received before the link is considered to have been lost. The Peripheral
Asynchronous connection-oriented logical transport
Asynchronous_connection-oriented_logical_transport
Herotel Metro Fibre Clear Access Evotel Fibre Geeks Lightstruck Link Africa Link Layer Mitsol Octotel Teralink Vodacom Zoom Fibre SADV Vukela Liquid Telecommunications
List of broadband providers in South Africa
List_of_broadband_providers_in_South_Africa
Topics referred to by the same term
Link-local may refer to: Data link layer, the second layer of the OSI model of computer networking Link-local address, a computer network address Local
Link-local
Supplemental data in an IP packet
of the higher-level transport layer protocol, but may be data for an internet layer (e.g., ICMP or ICMPv6) or link layer (e.g., OSPF) instead. Two different
IP_header
The Foundry Discovery Protocol (FDP) is a proprietary data link layer protocol. It was developed by Foundry Networks. Although Foundry Networks was acquired
Foundry_Discovery_Protocol
Software utility for discovering and probing hosts on a computer network
software utility for discovering hosts on a computer network by sending link layer frames using Address Resolution Protocol (ARP) requests addressed to a
Arping
In the OSI networking model, Data Link Control (DLC) is the service provided by the data link layer. Network interface cards have a DLC address that identifies
Data_Link_Control
Part of GSM mobile telephone standard
4. The Um data link layer, LAPDm, is defined in GSM 04.05 and 04.06. LAPDm is the mobile analog to ISDN's LAPD. The Um network layer is defined in GSM
Um_interface
Device that creates a larger computer network from two smaller networks
single network. In the OSI model, bridging is performed in the data link layer (layer 2). If one or more segments of the bridged network are wireless, the
Network_bridge
When a packet is passed from one network segment to the next
As the packet needs to be forwarded on the link layer the next hop needs only to resolve to a link layer address such as a MAC address. On Linux for
Hop_(computer_networking)
HTTP extension supporting TLS encryption
communication protocol is encrypted using Transport Layer Security (TLS) or, formerly, Secure Sockets Layer (SSL). The protocol is therefore also referred
HTTPS
Digital telecommunications protocol for voice, video, and data
second. In the Open Systems Interconnection (OSI) reference model data link layer (layer 2), the basic transfer units are called frames. In ATM, these frames
Asynchronous_Transfer_Mode
Computer networking concept
network traffic transmitted using one of three methods of sending data link layer network traffic to a destination of which the sender does not know the
Broadcast, unknown-unicast and multicast traffic
Broadcast,_unknown-unicast_and_multicast_traffic
travel, tourism, insurance
LINK LAYER
LINK LAYER
Surname or Lastname
English
English : from the medieval female personal name Line, a reduced form of Cateline (see Catlin) and of various other names, such as Emmeline and Adeline, containing the Anglo-Norman French diminutive suffix -line (originally a double diminutive, composed of the elements -el and -in).French (Liné) : metonymic occupational name for a linen weaver or a linen merchant, from an Old French adjective liné ‘made of linen’.
Surname or Lastname
German
German : from Middle High German lins(e) ‘lentil’, presumably a metonymic occupational nickname for a grower of lentils.German : from a short form of a Germanic personal name formed with Old High German lint ‘snake’ or linta ‘linden tree’, ‘shield’.English (Staffordshire) : unexplained. Possibly a variant of Lynes.Latvian : possibly from lins ‘flax’.
Female
French
French feminine form of Roman Cælinus, CÉLINE means "heaven."
Surname or Lastname
English
English : variant of Finch.German (Rhineland) : variant of Fink.
Surname or Lastname
English
English : topographic name for someone living by a bink, a northern dialect term for a flat raised bank of earth or a shelf of flat stone suitable for sitting on. The word is a northern form of modern English bench.Variant of Polish Binek, itself a variant of Bieniek.
Female
English
 English short form of Latin Linnaea, LINN means "twin flower." Compare with other forms of Linn.
Boy/Male
Hindu, Indian
Link
Female
Vietnamese
Vietnamese name LINH means "spring."
Surname or Lastname
English (mainly East Anglia)
English (mainly East Anglia) : habitational name from Lyng in Norfolk, so named from Old English hlinc ‘hillside’, or from either of two places in Norfolk and Lincolnshire named Ling, from Old Norse lyng ‘ling’, ‘heather’. There is also a Lyng in Somerset, so named from Old English lengen ‘long place’.German : variant of Link.Chinese : from a word meaning ‘ice’. In ancient times, the imperial palace was able to enjoy ice in the summer by storing winter ice in a cellar, entrusting its care to an official called the iceman. This post was once filled during the Zhou dynasty (1122–221 bc) by a descendant of Kang Shu, the eighth son of Wen Wang, who had been granted the state of Wei soon after the establishment of the Zhou dynasty. Descendants of this particular iceman adopted the word for ice, ling, as their surname.
Girl/Female
Arabic, Muslim
Bond; Link Nexus
Female
Welsh
 Welsh name LINN means "lake" or "waterfall." Compare with other forms of Linn.
Female
Hindi/Indian
(लीना) Hindi name LINA means "absorbed in; merged." Compare with other forms of Lina.
Female
Swedish
 Short form of Swedish Linnéa, LINN means "twin flower." Compare with other forms of Linn.
Boy/Male
American, Arabic, Australian, British, Chinese, English, Japanese, Latin
Lake Colony; From the Bank; From the Town by the Pool
Surname or Lastname
English
English : metonymic occupational name for a dresser of flax, from Middle English lynet, lynt ‘flax’.Dutch : from a short form of a Germanic name formed with lind (see Linde 1).Dutch : metonymic occupational name for a linen weaver or merchant.
Male
Italian
Italian and Spanish form of Latin Linus, LINO means either "a cry of grief"Â or "flax, linen."
Male
Hungarian
Hungarian form of Latin Valentinus, BÃLINT means "healthy, strong."
Female
Welsh
 Variant spelling of Welsh Linn, LIN means "lake" or "waterfall." Compare with another form of Lin.
Boy/Male
English
From the bank.
Surname or Lastname
English
English : nickname, possibly for a small person, from Middle English pink, penk ‘minnow’ (Old English pinc).English (southeastern) : variant of Pinch.Variant spelling of German Pinck, an indirect occupational name for a blacksmith, an onomatopoeic word imitating the sound of hammering which was perceived as pink(e)pank.German (of Slavic origin) : from a diminutive of Sorbian pien ‘log’, ‘tree stump’, hence probably a nickname for a solid or stubby person.
LINK LAYER
LINK LAYER
LINK LAYER
LINK LAYER
LINK LAYER
LINK LAYER
LINK LAYER
n.
Direction; as, the line of sight or vision.
v. t.
To read or repeat line by line; as, to line out a hymn.
n.
A hole or low place in land or rock, where waters sink and are lost; -- called also sink hole.
v. t.
To cause (the eyes) to wink.
v. t.
To put ink upon; to supply with ink; to blacken, color, or daub with ink.
v. i. & t.
To become lank; to make lank.
v. t.
To connect or unite with a link or as with a link; to join; to attach; to unite; to couple.
n.
A straight row; a continued series or rank; as, a line of houses, or of soldiers; a line of barriers.
n.
A measuring line or cord.
v. i.
To wink; to blink.
a.
Resembling the garden pink in color; of the color called pink (see 6th Pink, 2); as, a pink dress; pink ribbons.
a.
Produced prematurely; as, a slink calf.
n.
The equator; -- usually called the line, or equinoctial line; as, to cross the line.
v. t.
To make (a depression) by digging, delving, or cutting, etc.; as, to sink a pit or a well; to sink a die.
v. t.
To cause to sink; to put under water; to immerse or submerge in a fluid; as, to sink a ship.
v. t.
To mark with a line or lines; to cover with lines; as, to line a copy book.
n.
A connected series of public conveyances, and hence, an established arrangement for forwarding merchandise, etc.; as, a line of stages; an express line.
n.
A series or succession of ancestors or descendants of a given person; a family or race; as, the ascending or descending line; the line of descent; the male line; a line of kings.
v. t.
To form into a line; to align; as, to line troops.
n.
Anything doubled and closed like a link; as, a link of horsehair.
travel, tourism, insurance