Lowest abstraction layer in the Internet protocol suite
Internet protocol suite
Application layer
BGP
DHCP (v6)
DNS
FTP
HTTP (HTTP/3)
HTTPS
IMAP
IRC
LDAP
MGCP
MQTT
NNTP
NTP
OSPF
POP
PTP
ONC/RPC
RTP
RTSP
RIP
SIP
SMTP
SNMP
SSH
Telnet
TLS/SSL
XMPP
more...
Transport layer
TCP
UDP
DCCP
SCTP
RSVP
QUIC
more...
Internet layer
IP
v4
v6
ICMP (v6)
NDP
ECN
IGMP
IPsec
more...
Link layer
ARP
Tunnels
PPP
MAC
more...
v
t
e
In computer 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 methods and communications protocols confined to the link that a host is physically connected to. The link is the physical and logical network component used to interconnect hosts or nodes in the network and a link protocol is a suite of methods and standards that operate only between adjacent network nodes of a network segment.
Despite the different semantics of layering between the Internet protocol suite and OSI model, the link layer is sometimes described as a combination of the OSI's data link layer (layer 2) and physical layer (layer 1).
The link layer is described in RFC 1122 and RFC 1123. RFC 1122 considers local area network protocols such as Ethernet and other IEEE 802 networks (e.g. Wi-Fi), and framing protocols such as Point-to-Point Protocol (PPP) to belong to the link layer.
networking, the linklayer is the lowest layer in the Internet protocol suite, the networking architecture of the Internet. The linklayer is the group of...
The data linklayer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers...
The linklayer 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...
communications between systems are split into seven different abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application....
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...
the layers are the linklayer, containing communication methods for data that remains within a single network segment (link); the internet layer, providing...
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...
An application layer is an abstraction layer that specifies the shared communication protocols and interface methods used by hosts in a communications...
In computer networking, the transport layer is a conceptual division of methods in the layered architecture of protocols in the network stack in the Internet...
PCI Express is a layered protocol, consisting of a transaction layer, a data linklayer, and a physical layer. The Data LinkLayer is subdivided to include...
LinkLayer Topology Discovery (LLTD) is a proprietary linklayer protocol for network topology discovery and quality of service diagnostics. Microsoft...
that combine multiple frequency bands. OSI layer 2 (data linklayer, e.g. Ethernet frame in LANs or multi-link PPP in WANs, Ethernet MAC address) aggregation...
the logical link control (LLC) data communication protocol layer is the upper sublayer of the data linklayer (layer 2) of the seven-layer OSI model. The...
hostless system, directly to the Link Manager/ACL link. L2CAP's functions include: Multiplexing data between different higher layer protocols. Segmentation and...
logical link control (LLC) sublayer together make up the data linklayer. The LLC provides flow control and multiplexing for the logical link (i.e. EtherType...
linklayer protocol data unit and uses the underlying Ethernet physical layer transport mechanisms. In other words, a data unit on an Ethernet link transports...
the link types. Such protocols belong to the linklayer. Internet-layer protocols use IP-based packets. A common design aspect in the internet layer is...
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...
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...
In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery...
modems older than V.2. Asynchronous communication at the data linklayer or higher protocol layers is known as statistical multiplexing, for example Asynchronous...
nodes to determine and advertise an IPv6 address corresponding to a given link-layer address, similar to Reverse ARP for IPv4. The Secure Neighbor Discovery...
Technical Overview Define the OSI seven-layer architecture model the physical layer, data linklayer and application layer Network in addition to the signal...
that is partitioned and isolated in a computer network at the data linklayer (OSI layer 2). In this context, virtual refers to a physical object recreated...
exchange broadcast (slave-to-slave communication) The data linklayer FDL (Field bus Data Link) servicesand protocols work with a hybrid access method that...
communication link between the two stations in mobile or wireless communication. The air interface involves both the physical and data linklayers (layer 1 and...
protocol used for discovering the linklayer address, such as a MAC address, associated with a given internet layer address, typically an IPv4 address...
Global Information