CCNA_COURSE

  What is IP Address? IP Address or Logical Address - is a unique number, which is assigned to your device. IP Address: 1.   A Unique Identifier 2.   A way to identify machine / computer on a network 3.   Use to connect to another computer IP Address can be IPv4 and IPv6 IPv4 IP Address IP Address Classification   MAC Address vs IP Address CIDR

  VLANs are used to divide a physical LAN into multiple broadcast domains to isolate services with the aim of improving the security and management of the network. Hosts within a VLAN can directly communicate only with other hosts in the same VLAN and must use a router to communicate with hosts in other VLANs. Put IP Address to every PC Like this:   PC0   PC1     Now go to Switch CLI mode and done those command:     Here are the Configuration command for two Switch:     Switch> Switch>en Switch# Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#vlan 15 Switch(config-vlan)#name SRK Switch(config-vlan)# Switch(config-vlan)#ex Switch(config)# Switch(config)#vlan 16 Switch(config-vlan)#name SK Switch(config-vlan)#ex Switch(config)# Switch(config)#int range f0/1-2 Switch(config-if-range)#switchport mode access Switch(config-if-range)...

    If we want to make a FTP-server in network 172 and network 192. We have to give same IP address in FTP-Server. So we have to make sure that every time that FTP-Server get same IP address so that user can access. In R1 we gone create DHCP-server for two different network. Let’s starts R1 Configuration R1#conf R1(config)#hostname DHCP-Server DHCP-Server(config)#int f0/0 DHCP-Server(config-if)#no sh DHCP-Server(config-if)#ip add 172.16.32.1 255.255.254.0 DHCP-Server(config-if)#ex DHCP-Server(config)#int f0/1 DHCP-Server(config-if)#no sh DHCP-Server(config-if)# DHCP-Server(config-if)#ip add 192.168.10.1 255.255.255.0 DHCP-Server(config-if)#ex Create two different POOL for 192.168.10.0 and 172.16.32.0 network For network 192.168.10.0 For network 172.16.32.0 Now we are done with our configuration …now just put command ip dhcp in all pc for automatic IP address.   PC 1 PC2 PC3 PC4 PC5 PC6 Now we can see in PC5 & PC6 IP address is assign. But we will blind IP address 172....

  In R1 we gone create DHCP-server for two different network. Let’s starts R1 Configuration R1#conf R1(config)#hostname DHCP-Server DHCP-Server(config)#int f0/0 DHCP-Server(config-if)#no sh DHCP-Server(config-if)#ip add 172.16.32.1 255.255.254.0 DHCP-Server(config-if)#ex DHCP-Server(config)#int f0/1 DHCP-Server(config-if)#no sh DHCP-Server(config-if)# DHCP-Server(config-if)#ip add 192.168.10.1 255.255.255.0 DHCP-Server(config-if)#ex Create two different POOL for 192.168.10.0 and 172.16.32.0 network For network 192.168.10.0 For network 172.16.32.0 Now we are done with our configuration …now just put command ip dhcp in all pc for automatic IP address.   PC 1 PC2 PC3 PC4

  DHCP Relay Agent Configuration   Here is figure which we have may configure today. RAJSHAHI ROUTER CONFIGURATION: Router>enable Router#configure terminal Router(config)#hostname RAJSHAHI RAJSHAHI(config)#enable password mmr RAJSHAHI(config)#int g0/0 RAJSHAHI(config-if)#no sh RAJSHAHI(config-if)#ip address 172.3.4.1 255.255.255.128 RAJSHAHI(config-if)#ex RAJSHAHI(config)#int s0/0/0 RAJSHAHI(config-if)#no sh RAJSHAHI(config-if)#ip address 172.3.4.130 255.255.255.252 RAJSHAHI(config-if)#ex RAJSHAHI(config)#int g0/1 RAJSHAHI(config-if)#no sh RAJSHAHI(config-if)#ip address 172.3.3.1 255.255.255.0 RAJSHAHI(config-if)#ex   DHAKA ROUTER CONFIGURATION: Router>enable Router#conf terminal Router(config)#hostname DHAKA DHAKA(config)#ENAble password mmr DHAKA(config)#int s0/0/0 DHAKA(config-if)#no shutdown DHAKA(config-if)#clock rate 64000 DHAKA(config-if)#ip address 172.3.4.133 255.255.255.252 DHAKA(config-if)#ex ...

  Spanning Tree Protocol (STP) is a Layer 2 protocol that runs on bridges and switches. The specification for STP is IEEE 802.1D. The main purpose of STP is to ensure that you do not create loops when you have redundant paths in your network. Loops are deadly to a network. In this figure we can see, we use two copper cross over cable. Because if one cable down then another cable can transfer data. When we use two cable there can be 3 problem. Those are     Broadcast Strom     Multiple Frame Copies     CAM table Instabilities To avoid those problem we use STP and it build in every switch. How STP works 1 st step: Find Root bridge switch Which switch has the lowest MAC address is the root bridge switch. In figure we can see, switch0 has 0009.7CB9.000 is the lowest MAC address of two switch. So switch0 is the root bridge.   2 nd step: Find Root port Cost to reach root switch. In figure there are two pa...