Question 23

The most basic form of NAT,

Replaces the MAC address in datagrams passing from the site to the Internet

Replaces the IP address in datagrams passing from the site to the Internet

Replaces the TCP address in the frame passing from the site to the Internet

Replaces the UDP address in the frame passing from the site to the Internet

Question 24

What crucial information used by NAPT is not available in most IP fragments?

TTL (time to live)

Protocol port numbers

The unique server ID

The Fragment number

Question 25

Originally, separate protocols were used to obtain each of the configuration parameters needed at startup. The Dynamic Host Configuration Protocol (DHCP) extends which protocol to allow a host to obtain all necessary information with a single request?

Bootstrapping Protocol (BOOTP)

Transmission Control Protocol (TCP)

Address Resolution Protocol (ARP)

Internet Control Message Protocol (ICMP)

Question 26

Explain its purpose and the difference between a Layer 3 versus a Layer 2 Switch for VLANs and how they work.

Layer 3 is used to intelligently forward (route) packets while Layer 2 switches cant route packets based upon IP addresses

Layer 3 switches can logically segment a network into two or more VLANs, while Layer 2 switches easily retrieve packets and forward them very quickly (at near wire speed)

Layer 3 is less expensive than Layer 2 switches, both do the same job

All of the above

A and B above only

B and C above only

Question 27

What is the difference between a PAN, LAN, and WAN?

Size

Transfer media are different

Redundancy

Latency

Question 28

Name the specific technique used in security attacks to deny service to TCP.

Spoofing

Packet interception

SYN Flooding

Distributed denial of service attacks

Question 29

Which of the following are NOT major security problems on the Internet?

Loss of data

Loss of control

Denial of service

Misrepresentation

All of the above are major security problems