CCNA Study Material Network Interface Card (NIC) · NIC is the interface between the computer and the network. · It is also known as the LAN card or Ethernet card. · Ethernet card have a unique 48-bit address called as MAC (Media Access Control) address o Mac address is also called as Physical Address or Hardware address o The 48-bit MAC Address is represented as Hexadecimal digits o Example: 0016.D3FC.603F · Network cards are available at different speeds. o Ethernet (10 Mbps) o Fast Ethernet (100 Mbps) o Gigabit Ethernet (1000 Mbps) ARP - Address Resolution Protocol · With the help of ARP, MAC addresses are stored. · S...