Cisco Certified Network Associate Cisco Networking Academy Turku Polytechnic
CCNA1 – Module 7 • Legacy Ethernet (10Mbps), read from material • Fast Ethernet (100BASE-TX / -FX) – Three common characteristics (in TX and FX) • Timing, frame format (same as 10Mbps) and transmission process
– Uses different encoding system than 10Mbps, 4B/5B and MLT-3 (TX) and NRZI (FX)
CCNA1 – Module 7 • 1000BASE-TX , -CX, -SX, -LX – Use same timing parameters – Similar frame than 10Mbps
• Differences are at physical layer (compared to 10 and 100) – Speed requirements – Two encoding phases for fiber: 8B/10B and NRZ, and 4D-PAM5 for twisted pair
CCNA1 – Module 7 • Copper gigabit can be half or full-dublex • Fiber is only full-dublex • Distance limitations with fiber are guidelines, medium itself district the length of segment
CCNA1 – Module 7 • 10 Gbps Ethernet is basically same as previous Ethernets (frame, parameters) • Major difference is moving from LAN to MAN and WAN (physical layer implem.) • New and complex encoding techniques are used like WWDM (wide wavelenght division multiplexing)
CCNA1 – Module 7 • Future – – – – –
Increasing speed for Ethernet (720 Gbps) Special WAN applications like end-to-end Eth. Moving away from CSMA/CD QoS …
Fast Ethernet timing parameters
MLT-3 and NRZI
Timing parameters
Physical layer implementations
10 Gigabit timing parameters
10 GBASE-LX4 signal multiplexing