The Bits and Bytes of Computer Networking
Questions with Correct Answers
What are the 5 Networking Layers in order? Correct Answer-5.
Application layer
4. Transport layer
3. Network layer
2. data link layer
1. Physical layer
Physical Layer Correct Answer-This layer has devices that interconnect
computers with cabling connectors. It sends and receives signals on the
physical wire or antenna to transmit the bits found in frames.
Data Link layer Correct Answer-Responsible for defining a common
way of interpreting signals, so network deices can communicate.
Network Layer Correct Answer-Allows different networks to
communicate with each other through networks, such as the internet.
Transport Layer Correct Answer-This layer sorts out which client and
server programs are supposed to get that data.
Application Layer Correct Answer-Software that we use, the part of the
model that is closest to the user (gmail, browser, etc.). Permits
applications to request access to the network services.
,Layer 1
Cable, Ethernet, hubs Correct Answer-Physical Layer
Layer 2
Switch, Ethernet Protocol Correct Answer-Data Link layer
Layer 3
Internet Protocol, Router, Logical Addressing Correct Answer-Network
Layer
Layer 4
Transport Control Protocol, Client Server, Server, User Datagram
Protocol Correct Answer-Transport Layer
Layer 5
Web Browser, HTTP , SMTP - send receive email Correct Answer-
Application Layer
UDP or User Datagram Protocol Correct Answer-This is an alternative
communications protocol to Transmission Control Protocol. It is part of
the transport layer protocol. UDP is connectionless. This means there is
no setup or teardown of a connection.
,What is the difference between UDP & TCP? Correct Answer-The UDP
protocol works similarly to TCP, but it throws out all the error-checking
stuff. All the back-and-forth communication introduces latency, slowing
things down. TCP provides mechanisms to ensure that data is reliably
delivered while UDP does not.
Crosstalk Correct Answer-Caused by the electrical signals of one wire
disrupting the signals of another wire.
TCP or Transmission Control Protocol Correct Answer-A protocol
developed for the internet to get data from one network device to
another
IP or Internet Protocol Correct Answer-A set of rules governing the
format of data sent over the internet or other network.
Cat 5 Correct Answer-Type of cable that has the ability to transfer
information from one computer to another
Cat 5e Correct Answer-Enhanced cat 5 cable used for gigabit speeds and
minimum for Voice over IP
Cat 6e Correct Answer-This cable has shorter distance at higher speeds.
Fiber cable Correct Answer-Contain individual optical fibers that uses
light to transmit data.
, Which cable supports the longest distance to transmit data - Cat5, Fiber
Optic, Cat5e, Cat6e? Correct Answer-Fiber Optic
Hub Correct Answer-This is a physical layer device used to connect
network components. All the devices connected to a hub will end up
talking to all other devices at the same time.
Switch Correct Answer-A Data Link Layer device that connects network
segments. A switch can inspect the contents of the Ethernet protocol
data being sent around the network, determine which system the data is
intended for and then only send data to that one system.
Collision Domain Correct Answer-This is a network segment where
only one device can communicate at a time,
Hubs/Switches Correct Answer-primary devices used to connect
computers on a single local area network (LAN)
Router Correct Answer-A Network layer device that routes packets of
data between two or more networks.
BGP or Border Gateway Protocol Correct Answer-Protocol where
routers share data with each other, allowing them to determine the most
optimal path to forward traffic
Questions with Correct Answers
What are the 5 Networking Layers in order? Correct Answer-5.
Application layer
4. Transport layer
3. Network layer
2. data link layer
1. Physical layer
Physical Layer Correct Answer-This layer has devices that interconnect
computers with cabling connectors. It sends and receives signals on the
physical wire or antenna to transmit the bits found in frames.
Data Link layer Correct Answer-Responsible for defining a common
way of interpreting signals, so network deices can communicate.
Network Layer Correct Answer-Allows different networks to
communicate with each other through networks, such as the internet.
Transport Layer Correct Answer-This layer sorts out which client and
server programs are supposed to get that data.
Application Layer Correct Answer-Software that we use, the part of the
model that is closest to the user (gmail, browser, etc.). Permits
applications to request access to the network services.
,Layer 1
Cable, Ethernet, hubs Correct Answer-Physical Layer
Layer 2
Switch, Ethernet Protocol Correct Answer-Data Link layer
Layer 3
Internet Protocol, Router, Logical Addressing Correct Answer-Network
Layer
Layer 4
Transport Control Protocol, Client Server, Server, User Datagram
Protocol Correct Answer-Transport Layer
Layer 5
Web Browser, HTTP , SMTP - send receive email Correct Answer-
Application Layer
UDP or User Datagram Protocol Correct Answer-This is an alternative
communications protocol to Transmission Control Protocol. It is part of
the transport layer protocol. UDP is connectionless. This means there is
no setup or teardown of a connection.
,What is the difference between UDP & TCP? Correct Answer-The UDP
protocol works similarly to TCP, but it throws out all the error-checking
stuff. All the back-and-forth communication introduces latency, slowing
things down. TCP provides mechanisms to ensure that data is reliably
delivered while UDP does not.
Crosstalk Correct Answer-Caused by the electrical signals of one wire
disrupting the signals of another wire.
TCP or Transmission Control Protocol Correct Answer-A protocol
developed for the internet to get data from one network device to
another
IP or Internet Protocol Correct Answer-A set of rules governing the
format of data sent over the internet or other network.
Cat 5 Correct Answer-Type of cable that has the ability to transfer
information from one computer to another
Cat 5e Correct Answer-Enhanced cat 5 cable used for gigabit speeds and
minimum for Voice over IP
Cat 6e Correct Answer-This cable has shorter distance at higher speeds.
Fiber cable Correct Answer-Contain individual optical fibers that uses
light to transmit data.
, Which cable supports the longest distance to transmit data - Cat5, Fiber
Optic, Cat5e, Cat6e? Correct Answer-Fiber Optic
Hub Correct Answer-This is a physical layer device used to connect
network components. All the devices connected to a hub will end up
talking to all other devices at the same time.
Switch Correct Answer-A Data Link Layer device that connects network
segments. A switch can inspect the contents of the Ethernet protocol
data being sent around the network, determine which system the data is
intended for and then only send data to that one system.
Collision Domain Correct Answer-This is a network segment where
only one device can communicate at a time,
Hubs/Switches Correct Answer-primary devices used to connect
computers on a single local area network (LAN)
Router Correct Answer-A Network layer device that routes packets of
data between two or more networks.
BGP or Border Gateway Protocol Correct Answer-Protocol where
routers share data with each other, allowing them to determine the most
optimal path to forward traffic
