Frame Relay Access Device - ορισμός. Τι είναι το Frame Relay Access Device
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Τι (ποιος) είναι Frame Relay Access Device - ορισμός

WIDE AREA NETWORK TECHNOLOGY
FRF.12; Frame-Relay; Frame Relay Service; Frame Relay network; Frame relay; Frame-relay
  • Address field (2 octets)

Frame Relay Access Device      
<communications> (FRAD) Hardware and software that turns packets from TCP, SNA, IPX, etc into frames that can be sent over a Frame Relay wide area network. FRADs are a hot topic in data comms because companies like Netlink, Motorola, Stratacom are making lots of money out of them. (1995-11-17)
Frame Relay         
<communications> A DTE-DCE interface specification based on LAPD (Q.921), the Integrated Services Digital Network version of LAPB (X.25 data link layer). A common specification was produced by a consortium of StrataCom, Cisco, Digital, and Northern Telecom. Frame Relay is the result of wide area networking requirements for speed; LAN-WAN and LAN-LAN internetworking; "bursty" data communications; multiplicity of protocols and protocol transparency. These requirements can be met with technology such as {optical fibre} lines, allowing higher speeds and fewer transmission errors; intelligent network end devices (personal computers, workstations, and servers); standardisation and adoption of ISDN protocols. Frame Relay could connect dedicated lines and X.25 to ATM, SMDS, BISDN and other "fast packet" technologies. Frame Relay uses the same basic data link layer framing and Frame Check Sequence so current X.25 hardware still works. It adds addressing (a 10-bit Data Link Connection Identifier (DLCI)) and a few control bits but does not include retransmissions, link establishment, windows or error recovery. It has none of X.25's session layer but adds some simple interface management. Any network layer protocol can be used over the data link layer Frames. {Frame Relay Resource Center (http://alliancedatacom.com/framerelay.asp)}. (2000-07-14)
Frame story         
  • One of the earliest frame stories is in the ''[[Odyssey]]'', which begins with Odysseus telling stories to King [[Alcinous]] on the island of [[Scheria]].<ref name="Literary Devices" /> Painting of ''[[Odysseus at the Court of Alcinous]]'' by [[Francesco Hayez]], 1814-1815
  • ''The Return of [[Rip Van Winkle]]'', painting by [[John Quidor]], 1849
  • ''[[One Thousand and One Nights]]'' frames many stories with a single narrator, [[Shahrazad]]; embedded within it are further framed sets of tales, such as those of ''[[Sindbad the Sailor]]''. Illustration ''Sindbad the sailor and Ali Baba and the forty thieves'' by [[William Strang]], 1896
STORY IN A NESTED NARRATION THAT BRACKETS ONE OR MORE EMBEDDED STORIES
Frame tale; Frame Narrative; Framing story; Framing sequence; Frame narrative; Framing device; Narrative frame; Frame-story; Framing narrative; Frame (literature); Bookend scene; Bookend scenes; Frame narration; Frame-narratives; Framing sequences; Récit-cadre; Wraparound story
A frame story (also known as a frame tale, frame narrative, sandwich narrative, or intercalation) is a literary technique that serves as a companion piece to a story within a story, where an introductory or main narrative sets the stage either for a more emphasized second narrative or for a set of shorter stories. The frame story leads readers from a first story into one or more other stories within it.

Βικιπαίδεια

Frame Relay

Frame Relay is a standardized wide area network (WAN) technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology. Originally designed for transport across Integrated Services Digital Network (ISDN) infrastructure, it may be used today in the context of many other network interfaces.

Network providers commonly implement Frame Relay for voice (VoFR) and data as an encapsulation technique used between local area networks (LANs) over a WAN. Each end-user gets a private line (or leased line) to a Frame Relay node. The Frame Relay network handles the transmission over a frequently changing path transparent to all end-user extensively used WAN protocols. It is less expensive than leased lines and that is one reason for its popularity. The extreme simplicity of configuring user equipment in a Frame Relay network offers another reason for Frame Relay's popularity.

With the advent of Ethernet over fiber optics, MPLS, VPN and dedicated broadband services such as cable modem and DSL, Frame Relay has become less popular in recent years.