Question: The time to live field of an IP packet indicates:
Answer Choices:
The number of routers encountered by the packet during its journey.
The announced life of the packet by the source.
The remaining life of the packet in seconds.
The remaining life of the packet in network hops.
Answer: The remaining life of the packet in network hops.
Question: An organization with a class B network address has 100 subnets. The most suitable subnet mask for the organization is
Answer Choices:
255.255.252.0
255.255.248.0
255.255.255.0
255.255.254.0
Answer: 255.255.254.0
Question: When a network uses subnetting, the IP addresses in the organization can be seen to have at least ______ parts.
Answer Choices:
4
2
3
6
Answer: 3
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: In automatic allocation, IP addresses are assigned by DHCP:
Answer: Automatically and forever, based on a first-come-first-serve basis, from a pool of addresses.
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: The binary representation of the decimal number 231 is:
Answer Choices:
11100111
11000111
11001111
11000011
Answer: 11100111
Question: A routing table is a table stored in a router which keeps track of:
Answer Choices:
The best paths to neighboring networks
The best paths to destination networks
All known paths to neighboring networks
All known paths to destination networks
Answer: The best paths to destination networks
Question: When a client wishes to translate the hostname www.example.com, it sends a translation request to:
Answer: The DNS server responsible for the example.com domain
Question: The spanning tree protocol improves the performance of switched networks by:
Answer Choices:
Eliminating collisions
Reducing link distance
Eliminating loops
Adding routing
Answer: Eliminating loops
Question: The term UTP stands for:
Answer Choices:
Unshielded telephone pair
Unshielded twisted pair
Uncovered twisted pair
Uncovered telephone pair
Answer: Unshielded twisted pair
Question: An organization has 20 subnets. The subnet part of the IP addresses in the organization must have at least _______ bits.
Answer Choices:
7
5
4
6
Answer: 5
Question: As a physical medium, copper possesses all of the following properties, except:
Answer Choices:
Copper can transmit information over very long distances.
Copper is relatively inexpensive.
Copper is a good conductor of electricity.
Copper is relatively abundant.
Answer: Copper can transmit information over very long distances.
Question: A regular Ethernet address (MAC address) has ____ bits.
Answer Choices:
32
16
48
96
Answer: 48
Question: Hosts typically obtain their subnet mask information from
Answer Choices:
DHCP
None of the above
Network administrators, who configure hosts manually at first boot
The factory, where the subnet mask is hard-wired during computer assembly
Answer: DHCP
Question: An organization has 100 subnets. The subnet part of the IP addresses in the organization must have at least ______ bits.
Answer Choices:
5
7
8
6
Answer: 7
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: The IPv6 address 2001:0db8:0000:0000:0000:0000:0000:0001 should be written as:
Answer Choices:
2001:db8:0:0:0:0:0:1
2001:0db8:0:0:0:0:0:1
2001:0DB8:0:0:0:0:0:0001
2001:db8::1
Answer: 2001:db8::1
Question: DNS is used to:
Answer Choices:
Automate the allocation of IP addresses
Enable IP address reuse
Translate hostnames to IP addresses
Define non-routable IP addresses
Answer: Translate hostnames to IP addresses
Question: The ability of TCP to serve multiple applications simultaneously is called:
Answer Choices:
Multiplexing
Reliability
Connection establishment
Flow control
Segmentation
Answer: Multiplexing
Question: The left-most bits of an IP address identify the:
Answer Choices:
Host on the network.
The manufacturer of the host’s networking hardware.
The country in which the host is located.
The network in which the host is located.
Answer: The network in which the host is located.
Question: Layering is the practice of:
Answer Choices:
Breaking down user data into small segments
Using one wire to carry multiple signals simultaneously
Arranging functionality of components so that lower layers support the services of upper layers
Arranging functionality of components so that upper layers support the services of lower layers
Answer: Arranging functionality of components so that lower layers support the services of upper layers