mang may tinh

Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

• 252

• 253

• 254

• 255

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?

• session

• transport

• data link

• physical

A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?

• This is an Ethernet port operating at full duplex.

• This is an Ethernet port operating at half duplex.

• This is a 100 Mb/s switch port.

• This is a 10 Mb/s switch port.

Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

• the MAC address of router interface e0

• the MAC address of router interface e1

• the MAC address of the server network interface

• the MAC address of host A

Where does routing occur within the DoD TCP/IP reference model?

• application

• internet

• network

• transport

Based on the information given, which switch will be elected root bridge and why?

• Switch A, because it has the lowest MAC address

• Switch C, because it has the lowest priority

• Switch B, because it has the highest MAC address

• Switch D, because it has the highest priority

Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4. What will Switch-1 do with this data?

• Switch-1 will drop the data because it does not have an entry for that MAC address.

• Switch-1 will send an ARP request out all its ports except the port from which the data originated.

• Switch-1 will flood the data out all of its ports except the port from which the data originated.

• Switch-1 will forward the data to its default gateway.

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?

• path cost

• lowest port MAC address

• port priority number and MAC address

• VTP revision number

What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?

• It creates a VLAN 999 interface.

• It designates VLAN 999 for untagged traffic.

• It blocks VLAN 999 traffic from passing on the trunk.

• It designates VLAN 999 as the default for all unknown tagged traffic.

Which switch would STP choose to become the root bridge in the selection process?

• 32768: 11-22-33-44-55-66

• 32768: 22-33-44-55-66-77

• 32769: 11-22-33-44-55-65

• 32769: 22-33-44-55-66-78