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Chapter 4:Network Access, Fiber Optic Cabling, Ina Desirra Sukma 190710310…
Chapter 4:Network Access
Data Link Layer
Media Access Control
Providing Access to Media
Layer 2
Frame Structur e
Creating a frame
Standards
data link layer standards
Topologies
Controlling Access to the Media
Physical and Logical Topologies
Physical Layer Protocols
Physical Layer Media
Representative light pulse fiber signals
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Microwave (wireless) signals
Physical Layer Standards
Physical Layer Fundamental Principles
Layer 1
Bandwidth
Throughput
Types of Physical Media
Network Media
Copper Cabling
Characteristics of Copper Media
Digital Signal with Interference
Interference Signal
Pure Digital Signal
What the computer reads
Copper Media
Unshielded Twisted Pair (UTP) cable
Properties of UTP Cabling
UTP Cabling Standards
UTP Connectors
Types of UTP Cable
Ethernet Crossover
Rollover
Ethernet Straight-through
Shielded Twisted Pair (STP) cable
Coaxial cable
Cooper Media Safety
the separation of data and electrical power cabling must comply with safety code
cables must be connected correctly
installations must be inspected for damage
equipment must be grounded correctly
Wireless Media
WiFi, Bluetooth, WiMAX
Wireless LAN
Cisco Linksys EA6500 802.11ac wireless router
802.11 Wi-Fi Standards
WAN Topologies
Common Physical WAN Topologies
Hub and spoke topology
Point-to-point topology
Physical Point-to-Point Topology
Logical Point-to-Point Topology
Full mesh topology
Half and Full Duplex
LAN Topologies
Physical LAN Topologies
Estended star topology
Bus topology
Star topology
Ring topology
Logical Topology for Shared Media
Contention-Based Access
Characteristics
Stations can transmit at any time
Collision exist
There are mechanisms to resolve contention for the media
Contention-Based Technologies
CSMA/CD for 802.3 Ethernet networks
CSMA/CA for 802.11 wireless networks
Multi-Access Topology
Controlled Access
Characteristics
Devices wishing to transmit must wait their turn
No collisions
Only one station can transmit at a time
May use a token passing method
Controlled Access Technologies
Token Ring (IEEE 802.5)
Fiber Distributed Data Interface (FDDI)
Ring Topology
Data Link Frame
The frame
The header
Layer 2
Address
The Trailer
FCS
Stop Frame
LAN and WAN Frames
Ethernet Frame
Point-to-Point Protocol Frame
802.11 Wireless Frame
Fiber Optic Cabling
Fiber Media Cable Design
Buffer
Core
Strengthening material
Cladding
Jacket
Network Fiber Connectors
ST Connectors
SC Connectors
LC Connectors
Duplex Multimode LC Connectors
Fiber Media
Singlemode
Multimode
Properties of Fiber Optic Cabling
Ina Desirra Sukma 190710310