Business Data Networks and Security Review Questions with Verified Solutions Latest Update 2024
(Graded A+)
Host** - Answers Any computer or device attached to a network.
Message** - Answers A discrete communication between hardware and software
segment** - Answers A fragmented piece of a message to be transmitted over a network.
route** - Answers the entire path a transmission takes across an Internet.
packet** - Answers A message at the internet layer.
router** - Answers A device that forwards packets within an internet. It connects two or more single
networks (subnets).
Routing** - Answers 1. The forwarding of IP packets. 2. The exchange of routing protocol information
through routing protocols.
data link** - Answers the path that a frame takes across a single network (LAN or WAN)
host name** - Answers An unofficial designation for a host computer.
frame** - Answers 1. A message at the data link layer. 2. In time division multiplexing, a brief time
period, which is further subdivided into slots.
EUI-48** - Answers A common data link address format with a length of 48 bits. Formerly called a MAC
address.
Nonprofit organizations
User groups - Answers Who manages the internet?
The internet Engineering Task Force (IETF) sets standards, but compliance is voluntary. - Answers Who
creates internet standards?
Internet Assigned Numbers Authority (IAA) to help avoid address duplication - Answers Who controls
Internet addresses?
What do we mean by the Internet of Things (loT)? - Answers Technology now allows devices to talk to
one another directly without human involvement. These devices ca be very small, such as thermostats
and coffee makers.
Why is the internet duplicated as a cloud - Answers The users are not aware about the inside working of
the internet. The user assumes that the internet simply works. Like when you turn on a light switch.
, Application message (or Fragment), TCP Header &IP Header. - Answers What are the three parts of a
package?
Core Router - Answers Ranges from the height of a dorm room refrigerator to full-size refrigerators.
They are the powerhouse that can route high volumes of traffic and do complex routing to deliver
packets along different routes to large numbers of destinations. They are remotely manageable.
Residential routers - Answers Small little boxes that are multifunctional devices. They contain a internet
switch, a DHCP server, at least a simple firewall with routing as one of their functions. Everything coming
from the access routers connection to your devices is sent out to the internet, and everything from the
outside is set inside.
Corporate access point - Answers Are smaller than home access routers with several capabilities that
can be configured remotely.
Encapsulation** - Answers placing a message in the data field of another message
Purpose of DNS - Answers The domain name system allows host owners to create host names for their
servers. This is easier to remember than to write an IP address for a website.
ping - Answers Sending a message to another host and listening for a response to see if it active.
How routers make routing decisions - Answers Router A will make its decision intelligently, sending the
packet back out in the best way for the packet to reach its destination host.
Why is it okay to use reliable protocols in data communication? - Answers Although it checks for errors,
the sending internet process has no way to know if the packet has been received correctly, so it cannot
transmit lost or damaged packets based on whether or not they have been received correctly.
Packet purpose of the fields - Answers At layer3, basic unit of organization carried by frames in their
data fields variable length (long strings of bits of 1's and 0's
Packet - source & destination address, data field, check sum - Answers Each IPv4 packet has a source
and destination IP addresses. Each is 32 bits long, so each has its own row in the header. Routers use
destination IP addresses to decide how to forward packets so that they will get closer to their
destination.
Segment -purpose of the fields - Answers In the transmission control protocol, the host name for a
message at the transport layer. What is being transmitted.
segment - source port number - Answers The 16 bit port number of the process that originated the TCP
segment on the source device. This will normally be an ephemeral (client) port number for a request set
by a client to a server, or a well-known/registered (server) port number for reply from a server to a
client.
(Graded A+)
Host** - Answers Any computer or device attached to a network.
Message** - Answers A discrete communication between hardware and software
segment** - Answers A fragmented piece of a message to be transmitted over a network.
route** - Answers the entire path a transmission takes across an Internet.
packet** - Answers A message at the internet layer.
router** - Answers A device that forwards packets within an internet. It connects two or more single
networks (subnets).
Routing** - Answers 1. The forwarding of IP packets. 2. The exchange of routing protocol information
through routing protocols.
data link** - Answers the path that a frame takes across a single network (LAN or WAN)
host name** - Answers An unofficial designation for a host computer.
frame** - Answers 1. A message at the data link layer. 2. In time division multiplexing, a brief time
period, which is further subdivided into slots.
EUI-48** - Answers A common data link address format with a length of 48 bits. Formerly called a MAC
address.
Nonprofit organizations
User groups - Answers Who manages the internet?
The internet Engineering Task Force (IETF) sets standards, but compliance is voluntary. - Answers Who
creates internet standards?
Internet Assigned Numbers Authority (IAA) to help avoid address duplication - Answers Who controls
Internet addresses?
What do we mean by the Internet of Things (loT)? - Answers Technology now allows devices to talk to
one another directly without human involvement. These devices ca be very small, such as thermostats
and coffee makers.
Why is the internet duplicated as a cloud - Answers The users are not aware about the inside working of
the internet. The user assumes that the internet simply works. Like when you turn on a light switch.
, Application message (or Fragment), TCP Header &IP Header. - Answers What are the three parts of a
package?
Core Router - Answers Ranges from the height of a dorm room refrigerator to full-size refrigerators.
They are the powerhouse that can route high volumes of traffic and do complex routing to deliver
packets along different routes to large numbers of destinations. They are remotely manageable.
Residential routers - Answers Small little boxes that are multifunctional devices. They contain a internet
switch, a DHCP server, at least a simple firewall with routing as one of their functions. Everything coming
from the access routers connection to your devices is sent out to the internet, and everything from the
outside is set inside.
Corporate access point - Answers Are smaller than home access routers with several capabilities that
can be configured remotely.
Encapsulation** - Answers placing a message in the data field of another message
Purpose of DNS - Answers The domain name system allows host owners to create host names for their
servers. This is easier to remember than to write an IP address for a website.
ping - Answers Sending a message to another host and listening for a response to see if it active.
How routers make routing decisions - Answers Router A will make its decision intelligently, sending the
packet back out in the best way for the packet to reach its destination host.
Why is it okay to use reliable protocols in data communication? - Answers Although it checks for errors,
the sending internet process has no way to know if the packet has been received correctly, so it cannot
transmit lost or damaged packets based on whether or not they have been received correctly.
Packet purpose of the fields - Answers At layer3, basic unit of organization carried by frames in their
data fields variable length (long strings of bits of 1's and 0's
Packet - source & destination address, data field, check sum - Answers Each IPv4 packet has a source
and destination IP addresses. Each is 32 bits long, so each has its own row in the header. Routers use
destination IP addresses to decide how to forward packets so that they will get closer to their
destination.
Segment -purpose of the fields - Answers In the transmission control protocol, the host name for a
message at the transport layer. What is being transmitted.
segment - source port number - Answers The 16 bit port number of the process that originated the TCP
segment on the source device. This will normally be an ephemeral (client) port number for a request set
by a client to a server, or a well-known/registered (server) port number for reply from a server to a
client.
