MindMap Gallery Chapter 4 LAN and MAN
Soft Exam Network Engineer Chapter 4 Local Area Network and Metropolitan Area Network Super Detailed Mind Map. Everyone has a problem, that is, "cannot remember". What they have learned will be forgotten in a few days. I'm like this too, I always remember very slowly and forget quickly. If you want to fully grasp the knowledge test points, you must thoroughly understand the teaching materials and exam syllabus, and make comprehensive use of these two without focusing on one and neglecting the other, and study one-sidedly.
Edited at 2021-06-04 20:06:20This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
Chapter 4 LAN and MAN
Basics of local area network technology (LAN)
concept
Differences from WAN: Packet Broadcast Network
Core technology: shared channel allocation technology
Topology
bus topology
ring topology
star topology
IEEE802 standard
802.2
Logical link control sublayer LLC
802.3
CSMA/CD and physical layer specifications
802.11
Wireless LAN standards
Logical link control sublayer (802.2 standard)
Purpose
Shield different media access control methods to provide unified services and interfaces to higher layers (network layer)
frame structure
8-bit destination address, 8-bit source address, 8/16-bit control, M*8-bit information
LLC address
LLC layer service access point
No confirmation and no connection service
Connected services
There is a service that confirms no connection
IEEE 802.3 standard
Core protocol: CSMA/CD protocol
Fundamental
First monitor whether there is a carrier signal on the channel, and then decide according to the predetermined strategy
If the channel is idle, whether to send immediately
If the channel is busy, whether to continue monitoring
Listening algorithm
non-persistent
Go downstairs in a while
Type 1-persistent
Keep going downstairs
P-type persistence
Chances are we'll wait downstairs
Conflict (CD) detection principle
Send and listen at the same time
Binary exponential backoff algorithm
The value of the backoff delay T increases with an exponential of 2
Ability to effectively resolve conflict issues
CSMA/CD protocol implementation
main difference
Carrier monitoring
conflict monitoring
EthernetE
Traditional Ethernet
Using Manchester encoding
conflict resolution method
CSMA/CD
Fast Ethernet
Fast EthernetF
100BaseT4, 100BaseTX, 100BaseFX
4B/5B encoding
IEEE802.3u
Gigabit EthernetG
1000BaseTX, 1000BaseCX, 1000BaseLX, 1000BaseSX
IEEE802.3z
Full duplex, half duplex (CSMA/CD)
4B/5B or 8B/9B encoding
10 Gigabit Ethernet
IEEE 802.3ae
full duplex
Singlemode or multimode fiber
Virtual LAN VLAN
Use a router or layer 3 switch
VLAN assignment
static allocation
Port-based division
dynamic allocation
Division based on MAC address, network layer, IP multicast, rules
VLAN trunking
Two common standards
IEEE802.1Q
Cisco ISL
port
Access link mode (ACCESS)
Trunk link mode (Trunk)
VTP protocol and VTP pruning
VTP: VLAN Trunking Protocol
Purpose
Configure all VLAN information on the Ethernet switch and broadcast it to all switches in the management domain through VTP packets
Operating mode
Server mode
client model
Transparent mode
VTP pruning
Purpose
Cut off adjacent switch entries
method
static pruning
dynamic pruning
Neighboring switches share VLAN information
Cut out the inactive VLANs in the middle
LAN interconnection
Bridge protocol architecture
Purpose
Connect two LANs
Spanning Tree Bridge STP
Also called transparent bridge
IEEE802.1d
Frame forwarding process
Find-Select-Forward
step
1. Determine a root bridge
2. Determine the root ports of other networks
3. Determine the designated bridge and designated port for each LAN
4. Block non-root ports and non-designated ports
port status
closure
Port is in closed state
block
User data cannot be forwarded
monitor
The interface starts to start
study
Learn MAC address and build MAC table process items
Forward
User data can be forwarded
Source routing bridge
IEEE802.5
metropolitan area network
Metro Ethernet
IEEE 802.1ad (based on 802.1q technology)
Q-in-Q
IEEE802.1ah
MAC-in-MAC
Resilient Packet Network RPR
ring topology
IEEE802.17
Supports up to 255 workstations
Key technology
business type
spatial multiplexing
Topology discovery
fair algorithm
Ring self-healing protection