Networking Concepts Quiz: ARP and MAC Addressing

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Questions and Answers

Under which circumstance will a switch flood a frame out of every port except the port that the frame was received on?

The destination address in the frame is a known unicast address.

The destination address is unknown to the switch. (correct)

The source address in the frame is a multicast address.

The source address in the frame header is the broadcast address.

Which statement describes the treatment of ARP requests on the local link?

They are received and processed by every device on the local network. (correct)

They must be forwarded by all routers on the local network.

They are dropped by all switches on the local network.

They are received and processed only by the target device.

What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward?

Ethernet type

Source MAC address (correct)

Source IP address

Destination IP address

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. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

What property of ARP forces all Ethernet NICs to process an ARP request?

The destination MAC address <code>FF-FF-FF-FF-FF-FF</code> appears in the header of the Ethernet frame. Signup and view all the answers

What property of ARP causes a reply only to the source sending an ARP request?

The source MAC address appears in the header of the Ethernet frame. Signup and view all the answers

What property of ARP causes the request to flood out all ports of a switch except for the port receiving the ARP request?

The destination MAC address <code>FF-FF-FF-FF-FF-FF</code> appears in the header of the Ethernet frame. Signup and view all the answers

What property of ARP causes the NIC that is receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process?

The type field <code>0x806</code> appears in the header of the Ethernet frame. Signup and view all the answers

What is a potential network problem that can result from ARP operation?

Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic. Signup and view all the answers

Which destination address is used in an ARP request frame?

FFFF.FFFF.FFFF Signup and view all the answers

A network technician issues the `arp -d` command on a PC after the router connected to the LAN is reconfigured. What is the result after this command is issued?

The ARP cache is cleared. Signup and view all the answers

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

The switch will forward the frame to all ports except port 4. Signup and view all the answers

What is the aim of an ARP spoofing attack?

To associate IP addresses to the wrong MAC address. Signup and view all the answers

Refer to the exhibit. PC1 attempts to connect to File_server1 and sends an ARP request to obtain a destination MAC address. Which MAC address will PC1 receive in the ARP reply?

The MAC address of the G0/0 interface on R1. Signup and view all the answers

Which two types of IPv6 messages are used in place of ARP for address resolution?

Neighbor Solicitation and Neighbor Advertisement. Signup and view all the answers

Where are IPv4 address to Layer 2 Ethernet address mappings maintained on a host computer?

ARP Cache Signup and view all the answers

Study Notes

Question 1

A switch floods a frame to all ports except the one it received the frame on if the destination MAC address is unknown.
The source address in the frame is often a multicast address.

Question 2

ARP requests on a local network are processed by every device on the network.

Question 3

Layer 2 devices use the Destination MAC address in the Ethernet frame header to forward data.

Question 4

ARP table entries are time-stamped and purged after a timeout.
Static IP-to-MAC address entries can be manually added to the ARP table.

Question 5

Static IP-to-MAC address entries allow frequently used server MAC addresses to remain in the ARP table longer.
Entries in the ARP table are time-stamped and purged after a timeout expires.

Question 6

ARP allows hosts on a LAN to communicate with remote networks by learning the MAC address of the default gateway.

Question 7

The destination MAC address FF-FF-FF-FF-FF-FF in an Ethernet frame forces all network interfaces to process the ARP request.

Question 8

ARP replies are sent only to the source that sent the initial request, identified by the source MAC address.

Question 9

ARP requests are flooded to all ports on a switch except for the port receiving the request, because the destination MAC address is FF-FF-FF-FF-FF-FF.

Question 10

The 0x806 type field in the Ethernet frame header indicates it's an ARP request or response to the receiving NIC.

Question 11

A switch floods a frame to all ports except the one it received the frame on, if the destination MAC address is unknown.
The source address in a multicast frame can be a broadcast address.

Question 12

Network attackers may use ARP to map IP addresses to the wrong MAC addresses, thus intercepting traffic.

Question 13

ARP requests on a network are received by every device.

Question 14

The destination address in an ARP request is FF-FF-FF-FF-FF-FF.

Question 15

The arp -d command clears the ARP cache.

Question 16

A switch forwards a frame to all ports except the port where the originating frame originated.

Question 17

ARP poisoning can result in inaccurate MAC address/IP mappings.

Question 18

PC1 receives the MAC address of the router's interface (G0/0) in response to the ARP request.

Question 19

IPv6 uses Neighbor Solicitation and Neighbor Advertisement for address resolution instead of ARP.

Question 20

IPv4 address to Layer 2 Ethernet address mappings are stored in the ARP cache.

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Description

Test your understanding of ARP and MAC addressing concepts in networking. This quiz covers the functions of ARP, how MAC addresses are used by layer 2 devices, and the management of ARP tables. Dive into specific scenarios and enhance your knowledge of local area networks!