Chapter 4 Flashcards
What is 10BaseT
earliest form of ethernet designed to use UTP.
Describe an ethernet frame?
preamble,MAC dest address, source mac, type, data, pad, FCS
What does the preamble consist of?
64 bits of alternating ones and zeros that end with 11
-Let’s NIC know frame is coming and where frame starts.
what is a sniffer?
can order NIC to run in promiscuous mode.
What is the type field of an ethernet frame.
Lets receiving system know if its IPv4 or IPv6
What is the data?
the payload
What is the padding?
minimum frame size is 64 bytes
-adds extra data to bring up to 64 bytes.
What is the FCS of a frame?
CRC
What is CSMA/CD?
carrier sens multiple access/collision detection
-proper running network has max of 10% collissions
Describe the 10BaseT standar
- use of CAT 3, two-pair, UTP
- send on pins 1 and 2
- receive on pins 3 and 6
- distance less than 100 meters
- max nodes 1024.
- topology physical star, logical bus
Describe 10BaseFL
- max length 2km
- multimode
- sc or st
- speed 10 Mbps
What is mediat dependent interface(MDI)?
regular port on hub or switch
What is MDI-X?
uplink port
What is a bridge?
Acts like a repeater or hub to connnect two ethernet segments.
- filters and forwards traffic based on MAC addresses.
- mainly used in wireless networks.
What is an Ethernet switch?
- creates a source address table
- each port is its own collision domain.
- can buffer incoming frames
- full duplex ethernet: CSMA/CD is disabled.
