Question: The time to live field of an IP packet indicates:
Answer Choices:
The remaining life of the packet in network hops.
The announced life of the packet by the source.
The number of routers encountered by the packet during its journey.
The remaining life of the packet in seconds.
Answer: The remaining life of the packet in network hops.
Question: The important functions of the Transport layer include all of the following except:
Answer Choices:
Routing
Port addressing
Segmentation
Duplicate detection
Answer: Routing
Question: IMAP and POP are used to:
Answer Choices:
Manipulate the contents of the mailbox
Access web pages
Serve web pages
Deliver email to the destination mail server
Answer: Deliver email to the destination mail server
Question: The administrator for the “com” domain is responsible for authoritatively knowing the IP address of:
Answer Choices:
www.example.com
example.com
example.edu
A and B
Answer: A and B
Question: SMTP is used to:
Answer Choices:
Manipulate the contents of the mailbox
Access web pages
Deliver email to the destination mail server
Delete mail in the mailbox
Answer: Deliver email to the destination mail server
Question: When you use a GPS to navigate to the destination, the street address of the final destination is analogous to the:
Answer Choices:
IP address of a packet
Header length of a packet
MAC address of a frame
Port address of an application
Answer: IP address of a packet
Question: Clients locate the DHCP server on their network because:
Answer Choices:
The DHCP DISCOVER message sent by the computer is broadcast on the network.
The IP address of the DHCP server is typically programmed into the computer.
Any computer on the network can act as a DHCP server.
The client can act as its own DHCP server.
Answer: The DHCP DISCOVER message sent by the computer is broadcast on the network.
Question: Advantages of email include:
Answer Choices:
All of the above
The low cost of sending information to members in the organization
The ability to communicate asynchronously
The ability to eliminate cues related to age and gender
Answer: All of the above
Question: Clients locate the DNS server on their network because:
Answer Choices:
The IP address of the DNS server is typically programmed into the computer
All computers on the network act as DNS servers
The client can typically act as its own DNS server
They obtain it using DHCP at boot time
Answer: They obtain it using DHCP at boot time
Question: Multiplexing at the Transport layer enables:
Answer Choices:
Both of the above
None of the above
Multiple hosts to share a common physical medium
Multiple applications or the host to share a common network connection
Answer: Multiple applications or the host to share a common network connection
Question: Two devices from the same home send connection requests to the same web page. To distinguish between these requests, we can use:
Answer Choices:
Source IP and MAC addresses
Source IP address and sequence number
Source IP and port addresses
Require change in initiating sequence number
Answer: Source IP and port addresses
Question: A communication socket or Internet socket is defined by s/n:
Answer Choices:
None of the above
IP address and port address together
Port address
IP address
Answer: IP address and port address together
Question: The advantages of segmentation in TCP include:
Answer Choices:
Reduction in the amount of rework if a datagram is lost
Simplification of router hardware
Reduction in the likelihood of errors in each datagram
All of the above
Answer: All of the above
Question: Non-routable addresses are useful because:
Answer Choices:
They enable automatic assignment of IP addresses
They enable translation of host names to IP addresses
They enable IP address reuse
They are reserved for academic use
Answer: They enable IP address reuse
Question: Compared to routers, switches typically cannot:
Answer Choices:
Handle broadcasts
Select the correct path from multiple available paths
Locate the destination host on the network
Transfer data
Answer: Handle broadcasts
Question: SMTP is based on a ____ model of communication.
Answer Choices:
Broadcast
Pull
Anycast
Push
Answer: Push