640-822 무료 덤프문제 온라인 액세스

Which method of connecting a small office/home office to an ISP uses existing telephone lines?

• A.CSU/DSU
• B.serial
• C.cable
• D.DSL

What service do DNS servers provide?

• A.They map individual hosts to their specific IP addresses.
• B.Given an IP address, DNS servers determine the name of the host that is sought.
• C.They run a spell check on host names to ensure accurate routing.
• D.They provide names for network resources such as printers and servers.
• E.They resolve domain names to IP addresses.

How can an administrator determine if a router has been configured when it is first powered up?

• A.A configured router prompts for a password.
• B.A configured router goes to the privileged mode prompt.
• C.An unconfigured router goes into the setup dialog.
• D.An unconfigured router goes to the enable mode prompt.

Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments?

• A.Transport
• B.Network
• C.Data-link
• D.Physical

Refer to the exhibit. 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?

• A.Switch-1 will flood the data out all of its ports except the port from which the data originated.
• B.Switch-1 will send an ARP request out all its ports except the port from which the data originated.
• C.Switch-1 will forward the data to its default gateway.
• D.Switch-1 will drop the data because it does not have an entry for that MAC address.