Cisco Networking Chapter 9
What destination MAC address would be included in a frame sent from a source device to a destination device on the same local network if the device has no arp entries?
A broadcast MAC address of FF:FF:FF:FF:FF:FF
What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table?
A static IP-to-MAC address entry can be entered manually into an ARP table.
What statement describes the function of the Address Resolution Protocol?
ARP is used to discover the MAC address of any host on the local network.
What is an attack using ARP?
ARP poisoning
What property of ARP causes cached IP-to-MAC mappings to remain in memory longer?
Entries in an ARP table are time-stamped and are purged after the timeout expires.
What property of ARP allows hosts on a LAN to send traffic to remote networks?
Local hosts learn the MAC address of the default gateway.
What two functions are provided by ARP?
Maintains a table of IPv4 to MAC address mappings Resolves IPv4 addresses to MAC addresses
Which two ICMPv6 messages are used in to determine the MAC address of a known IPv6 address?
NA NS
Which two ICMPv6 messages are used in SLAAC?
RA RS
A network technician issues the arp -d * command on a PC after the router that is connected to the LAN is reconfigured. What is the result after this command is issued?
The ARP cache is cleared.
What destination MAC address would be included in a frame sent from a source device to a destination device on a remote local network?
The MAC address of the local router
What property of ARP forces all Ethernet NICs to process an ARP request?
The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on?
The frame has the broadcast address as the destination address. The destination address is unknown to the switch.
A PC is configured to obtain an IPv4 address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?
This is a static map entry
A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?
arp -a
Which two types of IPv6 messages are used in place of ARP for address resolution?
neighbor solicitation neighbor advertisement
What is the command to use on a Cisco router to view its ARP table? (all lower case)
show ip arp