Understanding ARP Protocol

What is the primary function of ARP (Address Resolution Protocol)?

• To assign IP addresses to devices

• To resolve IP addresses to MAC addresses

• To encrypt network traffic

• To manage network routing tables

Why is a MAC address necessary for communication on a local area network?

• It's used to locate a device on the internet

• It's required for DNS resolution

• It identifies the actual physical device

• It's needed for IP address assignment

When a device needs to communicate with another device on the network and doesn't have the MAC address, what does it do first?

• It sends a broadcast message immediately

• It contacts the DNS server

• It checks its ARP cache

• It pings the target IP address

What type of message does a device send out to request a MAC address for a known IP address?

• Unicast message

• Multicast message

• Broadcast message

• Anycast message

How does the ARP cache contribute to network efficiency?

• By reducing the number of IP addresses used

• By storing IP to MAC address associations

• By encrypting network traffic

• By compressing data packets

What are the two types of ARP entries mentioned in the video?

• Permanent and temporary

• Primary and secondary

• Dynamic and static

• Active and passive

Why are dynamic ARP entries periodically flushed from the cache?

• To save power on network devices

• To prevent the cache from filling with unused entries

• To force devices to update their IP addresses

• To improve network security

How can a network administrator create a static ARP entry?

• By editing the device's firmware

• By using the ARP command-line utility

• By modifying the DHCP server settings

• By updating the router's configuration

What is a potential benefit of using static ARP entries?

• Increased network speed

• Better compatibility between devices

• Reduced ARP broadcast traffic

• Improved security against ARP spoofing