11 - Questions - Packet Delivery
Host A with an IPv4 address 192.168.99.15/24 wants to send several packets to several destination IPv4 addresses listed here. Which address requires the use of a default gateway?
192.168.40.39/24 because it is outside of the network
Which two statements regarding ARP are true? (Choose two.)
ARP entries are not permanent. ARP tables are created and maintained dynamically.
Which three options are Layer 2 Ethernet characteristics? (Choose three.)
Ethernet uses MAC addresses. Layer 2 addressing identifies end devices in the LAN. Layer 2 enables the packet to be carried by the local media across each segment.
When a frame is forwarded to the destination by a switch, what happens with Layer 2 and Layer 3 addresses in the frame?
No addresses are changed by the switch
On which OSI layer does ARP function?
The correct answer is "Layer 2." ARP is a Layer 2 protocol and its scope is limited to the local LAN.
When a frame is forwarded to the destination by the router, what happens with Layer 2 and Layer 3 addresses in the frame?
The correct answer is "The router changes Layer 2 addresses, while Layer 3 addresses remain the same." Note that the router changes the Layer 2 address as needed, but it will not change the Layer 3 address. Remember that a switch does not change the frame in any way.
Does a Layer 2 switch have a MAC address?
The correct answer is "Yes, for remote access management." Switches do not need assigned MAC addresses for frame forwarding. However, they need a MAC address when remote access management is configured.
Which device is at the local network boundary de-encapsulating frames?
The correct answer is "router." At the boundary of each local network, a router, de-encapsulates the frame to read the destination address that is contained in the header of the packet.
Which three statements about a default gateway are true? (Choose three.)
The correct answers are "The default gateway and the host IPv4 addresses have the same network and subnet portions," "You normally configure the default gateway as an address on a Layer 3 switch interface," and "You normally configure the default gateway as an address on a router." The host and its default gateway are on the same network, so share the same network portion of the IP address. The default gateway serves to send packets out of the local network, not inside the local network. When routing packets between different networks, you configure the default gateway on a device with routing capabilities such as an L3 switch or a router.
Which command do you use to display the ARP table on Microsoft Windows?
arp -a
Which two features does ARP provide? (Choose two.)
mapping IPv4 addresses to MAC addresses on a network locally storing MAC addresses that are learned via ARP
What device will de-encapsulate a frame, read the destination IPv4 address in the packet, forward a packet to outgoing interface and re-encapsulate packet in a different frame before sending?
router
What is used by a router to determine where to forward data?
routing table
Which Cisco IOS command do you use to display the ARP table on a Cisco device?
show ip arp
