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1 & 2. IPS Link Layer (Internet Protocol Suite)

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Layer 1 & 2 Datagrams

IPv6 link layer components. Link State Routing Protocol. IS-IS (Intermediate System to Intermediate System) Open Shortest Path First. 2. Upper Link Layer (Internet Protocol) Multicast Address. Dynamic IP Assignment for Link Layer. IEEE 802. Tunneling Protocol (1 & 2 IPS link layer) Ethernet (1 & 2 - IPS link layer) ARP (Address Resolution Protocal (IPS 1 & 2 - link layer) Fiber Distributed Data Interface. Fiber Distributed Data Interface (FDDI) is a standard for data transmission in a local area network.

Fiber Distributed Data Interface

It uses optical fiber as its standard underlying physical medium, although it was also later specified to use copper cable, in which case it may be called CDDI (Copper Distributed Data Interface), standardized as TP-PMD (Twisted-Pair Physical Medium-Dependent), also referred to as TP-DDI (Twisted-Pair Distributed Data Interface). Description[edit] FDDI provides a 100 Mbit/s optical standard for data transmission in local area network that can extend in range up to 200 kilometers (120 mi).

Although FDDI logical topology is a ring-based token network, it did not use the IEEE 802.5 token ring protocol as its basis; instead, its protocol was derived from the IEEE 802.4 token bus timed token protocol. In addition to covering large geographical areas, FDDI local area networks can support thousands of users. Topology[edit] Frame format[edit] The FDDI data frame format is: RFC 893 - Trailer encapsulations.

Category:Link protocols. From Wikipedia, the free encyclopedia This category contains link protocols used in the Data Link Layer (Layer 2) of the OSI model and the Link Layer of the Internet Protocol Suite.

Category:Link protocols

Note that in some text books, the term Link Layer also includes Physical Layer protocols, but those are not listed here, but in Category:Physical layer protocols. Subcategories This category has the following 7 subcategories, out of 7 total. Pages in category "Link protocols" The following 79 pages are in this category, out of 79 total. Integrated Services Digital Network. ISDN is a circuit-switched telephone network system, which also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in potentially better voice quality than an analog phone can provide.

Integrated Services Digital Network

It offers circuit-switched connections (for either voice or data), and packet-switched connections (for data), in increments of 64 kilobit/s. A major market application for ISDN in some countries is Internet access, where ISDN typically provides a maximum of 128 kbit/s in both upstream and downstream directions. Channel bonding can achieve a greater data rate; typically the ISDN B-channels of three or four BRIs (six to eight 64 kbit/s channels) are bonded. ISDN should not be mistaken for its use with a specific protocol, such as Q.931 whereas ISDN is employed as the network, data-link and physical layers in the context of the OSI model. Media access control. Functions performed in the MAC sublayer[edit] According to IEEE Std 802-2001 section 6.2.3 "MAC sublayer", the primary functions performed by the MAC layer are:[1] Frame delimiting and recognitionAddressing of destination stations (both as individual stations and as groups of stations)Conveyance of source-station addressing informationTransparent data transfer of LLC PDUs, or of equivalent information in the Ethernet sublayerProtection against errors, generally by means of generating and checking frame check sequencesControl of access to the physical transmission medium In the case of Ethernet, according to 802.3-2002 section 4.1.4, the functions required of a MAC are:[2]

Media access control

Digital subscriber line. Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that provide internet access by transmitting digital data using a local telephone network which uses the Public switched telephone network.

Digital subscriber line

In telecommunications marketing, the term DSL is widely understood to mean asymmetric digital subscriber line (ADSL), the most commonly installed DSL technology. DSL service is delivered simultaneously with wired telephone service on the same telephone line. This is possible because DSL uses higher frequency bands for data. On the customer premises, a DSL filter on each non-DSL outlet blocks any high frequency interference, to enable simultaneous use of the voice and DSL services.

A 2007 book described DSL as "the most globally prolific broadband access technology, yet it is only available to around 60–75 percent of the population in many developed countries. Point-to-Point Protocol. PPP is used over many types of physical networks including serial cable, phone line, trunk line, cellular telephone, specialized radio links, and fiber optic links such as SONET.

Point-to-Point Protocol

PPP is also used over Internet access connections. Internet service providers (ISPs) have used PPP for customer dial-up access to the Internet, since IP packets cannot be transmitted over a modem line on their own, without some data link protocol. Two derivatives of PPP, Point-to-Point Protocol over Ethernet (PPPoE) and Point-to-Point Protocol over ATM (PPPoA), are used most commonly by Internet Service Providers (ISPs) to establish a Digital Subscriber Line (DSL) Internet service connection with customers.

Description[edit] PPP was designed somewhat after the original HDLC specifications. Neighbor Discovery Protocol. The Neighbor Discovery Protocol (NDP) is a protocol in the Internet protocol suite used with Internet Protocol Version 6 (IPv6).

Neighbor Discovery Protocol

It operates in the Link Layer of the Internet model (RFC 1122) and is responsible for address autoconfiguration of nodes, discovery of other nodes on the link, determining the link layer addresses of other nodes, duplicate address detection, finding available routers and Domain Name System (DNS) servers, address prefix discovery, and maintaining reachability information about the paths to other active neighbor nodes (RFC 4861).[1] The protocol defines five different ICMPv6 packet types to perform functions for IPv6 similar to the Address Resolution Protocol (ARP) and Internet Control Message Protocol (ICMP) Router Discovery and Router Redirect protocols for IPv4.

However, it provides many improvements over its IPv4 counterparts (RFC 4861, section 3.1). Technical details[edit] 2. OSI Data Link Layer. 1. OSI Physical Layer. IPS (Internet Protocol Suite) Networking (Engineering - Communication) Protocals, Communications & Signals.