Adress Resolution Flashcards
What does ARP stand for?
Address Resolution Protocol
ARP is used to map IP addresses to MAC addresses.
What is the purpose of ARP?
To link IP addresses with MAC addresses
ARP resolves IP addresses to MAC addresses.
What is the command to view the ARP table on a router?
show ip arp
This command displays the ARP table entries.
What happens if the destination IP is in the same network as the source IP?
- Check if it is in the same IP net (if so)
- Check ARP-Table entry
If an entry exists, use it; otherwise, send an ARP-Request.
What is an ARP-Request used for?
To ask who has this specific destination IP and what is the MAC address
ARP-Requests are broadcasted to discover MAC addresses.
What MAC address is used for ARP-Broadcast?
FF-FF-FF-FF-FF-FF
This address is used for broadcasting ARP requests within a LAN.
How long do ARP-Table entries typically exist?
15-45 seconds (depends on the OS)
The duration depends on the operating system.
What is ARP Flooding?
Flooding ARP-Broadcast Requests, reduction of perfomance
It can lead to a reduction in network performance.
What is ARP Poisoning?
Spoofing as Default Gateway for MITM attack
It involves sending false ARP messages to redirect traffic.
What command shows the ARP table on a Windows PC?
arp -a
This command displays the local ARP table entries.
What does Neighbor Discovery do in IPv6?
- Address Resolution
- Router Discovery
- Redirection Services
It replaces ARP in IPv6 networks.
Which protocols are used in Neighbor Discovery?
- ICMPv6 Neighbor Solicitation (NS)
- ICMPv6 Neighbor Advertisement (NA)
These protocols facilitate address resolution and router discovery.
Does Neighbor Discovery use multicast or broadcast?
Multicast
This is in contrast to ARP, which uses broadcast.
What is the command to switch to privilege exec mode on a router?
enable
This command elevates the user’s permissions.
What command is used to configure the terminal on a router?
config t
This command enters configuration mode.
What command is used to show a brief overview of IP interfaces?
show ip interface brief
This command provides a summary of the status of interfaces.
What does the command ‘no shutdown’ do?
Activates the port
This command enables the specified interface.
What is the type-field value for ARP?
0x806
This hexadecimal value identifies ARP in the Ethernet frame.
What is the purpose of the command ‘show ip route’?
Displays routes and their types
This command provides information on routing paths in the network.
What is the significance of ‘Status up up’?
Indicates carrier signal present and port is active
It means the interface is operational and connected.
Fill in the blank: The command ‘interface g0/0/0’ is used to select _______.
[an interface]
This command is used to specify which interface to configure.
What type of IPv6 address is represented by FE80:?
Link Local
Link-local addresses are used for communication within a single network segment.
What type of IPv6 address is represented by 2001:?
Global Unicast (routed)
Global unicast addresses are routable on the internet.
