Pertemuan 16 Layer Data Link - Lanjutan Matakuliah : H0484/Jaringan Komputer Tahun : 2005 Versi : 1/0 Pertemuan 16 Layer Data Link - Lanjutan
Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menjelaskan ketentuan baku dan format frame pada data link layer
Outline Materi Standards Frame format
Frame Structure In synchronous transmission all transmissions are in frames Single frame format for all data and control exchanges Basic Structures: Character Oriented Protocol (COP) - BSC (Bisynchronous) Bit Oriented Protocol (BOP) - HDLC, SDLC
Generic Frame Structure (BOP)
Bit stuffing and removal Bit stuffing is the process of adding one extra 0 whenever there are five consecutive 1s in the data so that the receiver does not mistake the data for a flag.
HDLC can be considered as the base protocol format Data Link Protocols HDLC - High-Level Data Link Control SDLC - Synchronous Data Link Control PPP - Point to Point Protocol Ethernet HDLC can be considered as the base protocol format
High-Level Data Link Control Frame format for bit-oriented protocols.
PPP – Point to Point Protocol The PPP full frame format for unnumbered mode operation.
Protocol stack Link Control Protocol (LCP) Authentication Protocols Network Control Protocol (NCP) Bit Padding Digital Signals (DS) Services
Encapsulated LCP packet
PPP – Point to Point Protocol
An example