Ccna | Basic Notes [work]

The standard CCNA dynamic protocol.

| Layer | Name | Function | PDU | Key Devices | |-------|------|----------|-----|--------------| | 7 | Application | User interface (HTTP, FTP, SMTP) | Data | Gateway | | 6 | Presentation | Data format (encryption, compression) | Data | Gateway | | 5 | Session | Session setup & teardown | Data | Gateway | | 4 | Transport | Reliable/unreliable delivery (TCP/UDP) | Segment | Firewall | | 3 | Network | Routing & logical addressing (IP) | Packet | Router | | 2 | Data Link | Physical addressing (MAC), error detection | Frame | Switch/Bridge | | 1 | Physical | Bits over media (voltage, pins) | Bits | Hub/Repeater | Ccna Basic Notes

R1(config)# interface gigabitethernet0/1 R1(config-if)# ip nat outside The standard CCNA dynamic protocol

R1(config)# ip dhcp excluded-address 192.168.1.1 192.168.1.10 R1(config)# ip dhcp pool LAN_POOL R1(dhcp-config)# network 192.168.1.0 255.255.255.0 R1(dhcp-config)# default-router 192.168.1.1 R1(dhcp-config)# dns-server 8.8.8.8 R1(dhcp-config)# lease 7 show running-config : View the current active configuration

ip address [address] [mask] : Assign an IP address to an interface. no shutdown : Manually enable an interface. show running-config : View the current active configuration.

The Open Systems Interconnection (OSI) model is a conceptual framework used to understand network interactions in seven layers:

To prepare for the CCNA exam, we recommend the following study materials: