Linux network
file sharing occurs between --PC invention Ethernet
NIC hardware - MAC address
file sharing occurs between --PC invention Ethernet
NIC hardware - MAC address
One: Physical layer
HUB - Hub bus structure flood
broadcast domain / domain conflicts
HUB - Hub bus structure flood
broadcast domain / domain conflicts
Story:
In the early network, PC interoperability can only MAC address forwarding data; - Layer 2 forwarding the concept of
bridge - --- switch maintains a MAC address table
In the early network, PC interoperability can only MAC address forwarding data; - Layer 2 forwarding the concept of
bridge - --- switch maintains a MAC address table
Three:
With the increase of network devices that require network more and more; this time, the communication of these devices is a document - had a logical address;
IPv4 IPv6 Novell IPX AppleTalk DEC - these are early logical address
network interconnection - the route up!
Router - a routing table
With the increase of network devices that require network more and more; this time, the communication of these devices is a document - had a logical address;
IPv4 IPv6 Novell IPX AppleTalk DEC - these are early logical address
network interconnection - the route up!
Router - a routing table
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Four layers: the transport layer
core tasks have a transition - Application Interworking
application port:
the TCP: 1-1023 1024-65535
20 is 21 is 22 is 23 is 53 is 25 80 443 110 445 111 ...
the UDP:
67 68 69
core tasks have a transition - Application Interworking
application port:
the TCP: 1-1023 1024-65535
20 is 21 is 22 is 23 is 53 is 25 80 443 110 445 111 ...
the UDP:
67 68 69
Application Layer:
program application
program application
==========================================================
Access to network resources of a real process; (see figure)
1, the network resources of a PC - kernel space management
2. Application Layer (interprocess communication)
1, internal PC communication process - 1, 2, single parent and child communication signal communication
2, the process of communication between the PC - 1, rpc * 2, socket socket (do separate application) *
1, the network resources of a PC - kernel space management
2. Application Layer (interprocess communication)
1, internal PC communication process - 1, 2, single parent and child communication signal communication
2, the process of communication between the PC - 1, rpc * 2, socket socket (do separate application) *
==========================================================
About Host command control networks:
the ifcfg family command: ifconfig netstat route
ifconfig
ifconfig displays the current interface up
ifconfig lo0 | eth0
-a
ifconfig interface name IP address netmask mask [up | down]
After the IP address configuration take effect immediately, but the restart card later, he returned to resume
ifconfig eth0 add 192.168.94.201 netnask 255.255.255.0 // automatically generated eth0: 0 sub-interface (label), del you can delete the
tunnel can add a tunnel
route
view and add routes
route -n // -n do analytical
Add route
1, add a default route (adding gateways)
route add 192.168.94.2 default GW
2, was added a host route (destined for a fixed IP address)
route add -host 192.168.95.95 dev eth0
. 3, to add a route segment
route add -net 192.168.95.0 network 255.255.255.0 eth0
Route type: Flags - U up H host G gw
delete routes
del
the ifcfg family command: ifconfig netstat route
ifconfig
ifconfig displays the current interface up
ifconfig lo0 | eth0
-a
ifconfig interface name IP address netmask mask [up | down]
After the IP address configuration take effect immediately, but the restart card later, he returned to resume
ifconfig eth0 add 192.168.94.201 netnask 255.255.255.0 // automatically generated eth0: 0 sub-interface (label), del you can delete the
tunnel can add a tunnel
route
view and add routes
route -n // -n do analytical
Add route
1, add a default route (adding gateways)
route add 192.168.94.2 default GW
2, was added a host route (destined for a fixed IP address)
route add -host 192.168.95.95 dev eth0
. 3, to add a route segment
route add -net 192.168.95.0 network 255.255.255.0 eth0
Route type: Flags - U up H host G gw
delete routes
del
ip family command: ip [link | addr | route ] ss
GUI management: system-config-network-tui / setup
configuration file:
/ etc / sysconfig / Network-scripts / the ifcfg-interface
/ etc / sysconfig / Network-scripts / route
/etc/udev/rules.d/70-persistent-net.rules