Ethernet LAN Switching Flashcards
- Length – 7- byte (56 - bit)
Preamble
10101010 * 7
Preamble
Allows devices to synchronize their receiver clocks
Preamble
Meaning of SFD
Start Frame Delimiter
Length – 1 byte ( 8 - bit)
SFD
10101011
SFD
Marks the end of the preamble, and the
beginning of the rest of the frame
SFD
Meaning of FCS
Frame Check Sequence
- Indicate the devices sending and receiving the frame
Destination and Source
Consist of the
________ and ________ “MAC address
Destination and Source
Meaning of MAC
Media Access Control
It is the 6 - byte ( 48 – bit) address of the physical device
MAC Address
has a length of 2- byte (16 - bit) field
Type or Length
A value of 1500 or less in this field indicate the length of the encapsulated packets (in bytes)
Type or Length
- A value of 1536 or greater in this field indicates the ____ of the encapsulated packet
Type or Length
What kind of IP has this hexadecimal:
0x0800?
IPv4
What kind of IP has this hexadecimal:
0x86DD?
IPv6
has a 4- byte (32-bit) length
FCS
Detects corrupted data by running a “CRC” algorithm over the received data
FCS
CRC stands for ?
Cyclic Redundancy Check or Cyclic Redundancy Codes
The Ethernet Frame has a length of ____ bytes
26 - byte ( header + trailer)
It is also known as a Burned –In Address (BIA)
MAC Address
True or False
MAC Address is globally unique
MAC ADDRESS
True
OUI stands for?
MAC ADDRESS
Organizationally Unique Identifier
Modified True or False
The first 3 bytes are assigned by the retailer of the device
MAC ADDRESS
maker or manufacturer
TRUE OR FALSE
The last 3 bytes are unique to the device itself.
MAC ADDRESS
TRUE
