Through wires, connectors, voltages, data rates TCP/ IP A suite of protocols TCP.
Physical addressing, network topology, error notification and flow control PHYSICAL LAYER.
Provides reliable transfer of data across media.
Provides connectivity and path selection between two end systems.
Information flow control NETWORK LAYER.
Establishes, maintains, and terminates virtual circuits.
Concerned with data transport issues between hosts.
Establishes, manages, and terminates sessions between applications.
Compression, decompression, encryption and decryption SESSION LAYER.
Negotiates data transfer syntax for application layer.
Ensures data is readable by receiving system.
Provides network services to application processes like e-mail, File Transfer, and Terminal Emulation.
5 to 100+ devices OSI Reference Model Application layer, Presentation layer, Session layer, Transport layer Network layer, Data link layer, Physical layer APPLICATION LAYER.
RING Topology Topologies are logical Architecture Actual devices need not be physically organized in these configurations BUS and TREE Topology TREE Topology branch with multiple nodes.
Attaches directly to both rings and ensures that any SAS failure or power-down does not bring down the ring NETWORK TOPOLOGIES Defines Network Device Organization Four common types.
also called as Dual- attached concentrator (DAC).
Dual attachment stations ( DAS ) for servers.
Single attachment station ( SAS ) for PC’s.
Secondary ring for reliability and robustness Components.
implements FDDI over STP and UTP cable Dual Ring Architecture.
Used for corporate and carrier backbones CDDI.
Fiber optic cable with mass length of 2 km.
Token ring LANs continuously pass a token or a Token Ring frame.
4 or 16 MbPS Logically a ring but physically a star configuration to MAU relays.
PRE uses either SFD or synch DA – Destination Address – 6 bytes LSB is 0 – Individual Address 1 – Group Address TOKEN RING.
PRE – Preamble – 7 bytes in alternating 1’s, 0’s – indicating the receiver stations that frame is coming SFD – Start Frame Delimiter / synch – 1 byte 1,0,1,0,1,0,10,1 1,1,1,1,1,1,1,1 Alternations all 1’s 1, 0
Ccna network visualizer 8.0 free download full version mac#
Įthernet` at Data Link layer is responsible for Ethernet addressing, commonly referred to as hardware addressing or MAC addressingĮthernet is also responsible for framing packets received from the network layer and preparing them for transmission on the local network through Ethernet CONTENTION Media Access Method.
3.ĮTHERNET TOKEN RING FDDI ġ0 MbPS Revisions o Fast Ethernet 100 MbPS o Gigabit Ethernet 100 MbPS or 1 GbPSĬSMA/CD Used LED used in LAN’s used LASER used in telephone networkĬonnectors * SC * ST NETWORK TECHNOLOGIES 1. Long wavelength, Multimode or Single Mode [100 Short wavelength, 2000 mts Standard Ethernet Thin EthernetįIBER OPTIC SPECIFICATION 1000 Base LX km] 1000 Base SX 10 Base F T 568 B Orange White Orange Green White Blue Blue White Green Brown White BrownĬonnectors BNC It includes T-connector Parallel connector Terminator VAM PIRE TAP BNC CROSS OVER T 568A Green White Green Orange White Blue Blue White Orange Brown White Brown T 568 A Green White Green Orange White Blue Blue White Orange Brown White Brown STRAIGHT THROUGH T 568 A Green White (TX +) Green (TX-) Orange White (RX +) Blue Blue White Orange (RX-) Brown White Brown STRAIGHT THROUGH ( T568A – T568 A ) CROSS OVER ( T568A – T568 B) STP Connector RJ 45, RJ 11, RS- 232, RS -449 155 MbPS Connections 1. Used for telephone (1 pair) 4 MbPS for token ring (2 pairs) 10 MbPS for Ethernet (4 pairs) 16 MbPS for Fast Token Ring (4 pairs) 100 MbPS for Fast Ethernet (4 pairs) 1 GbPS for Gigabit Ethernet 1 Gbps for Multi Gigabitġ000MbPS 10 MbPS Baseband Twisted Pair (100 mts)ġ00 MbPS Baseband Twisted Pair (100 mts) 100 MbPS Baseband (220 mts) Shielded twisted pair ( STP) UTP categories a. Wireless LAN TIA Standard (Telecommunication Information Association) Twisted Pair Cable 1. Network Operating System ( NOS) Transmission Media 1. Hardware Network Interface Card ( NIC ) Transmission Media Two or more Computers Network Devices Introduction Cables, Connectors Standards – Ethernet – Token Ring – FDDI OSI Reference Model Types of Service
0 kommentar(er)
