Give the examples of network core devices Give the examples of physical media? Are they network core or network edge devices? What is queuing delay and packet loss? Solution Answer 3: Example of Network core devices: There are many core devices such as gateways, routers, network bridges, modems, networking cables, line drivers, switches, hubs, and repeaters in networks. Gateways : Gateways are also called protocol converters, can operate at any network layer. A gateway is a router in a computer network. Or we can say that, a major key stopping point for the data on its way to or from other networks, because of gateways, we are able to communicate and send data back. Routers : A router is a networking device that can forwards data packets between computer in networks. Routers do perform the traffic controlling or directing functions on the Internet. A data packet is forwarded from one router to another router, through the networks that have the internetwork until it reaches its destination computer or node. Bridge : A network bridge is a device that connects a local area network (LAN) to another LAN that uses the same protocol as Ethernet or token ring or any other. Modems : A modem is a network device or a program, that enables a computer to transmit data over networking cables, for example : telephone or cable lines or any other. Computer informations are stored in form of digital, whereas information transmitted over telephone lines. it is transmitted in the form of analog waves. Answer 4: physical media: It is refers to the physical materials that are used to transmit information in data communications. It is called as physical media because the media is generally a physical object like as copper or glass. that can be touched and felt, and it also has physical properties like as weight, color and thikness. there are many physical devices like as: 1. Twisted pair cables - Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company. There Wire are twisted to avoid crosstalk or any interference for instance, electromagnetic radiation from cables, and crosstalk between neighboring pairs. there are two types of Twisted pair cable like as: a. shielded Twisted pair cable b. unshielded Twisted pair cable. 2. Coaxial cables - it is the kind of copper cable used by cable TV companies. it is used in between of antenna and homes and businesses. Coaxial cable is also used by telephone companies. Coaxial cable is also called as coax. it is a type of cable that has an inner conductor surrounded by a tubular insulating layer, an above of that surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer sheath or jacket. 3. fiber optics:it is medium or technology associated with the transmission of information as light form along a glass or plastic wire or fiber. Fiber optic cables allow to carries much more information than conventional copper wire and is safer in term of.

1. Give the examples of network core devices Give the examples of physical media? Are they
network core or network edge devices? What is queuing delay and packet loss?
Solution
Answer 3:
Example of Network core devices:
There are many core devices such as gateways, routers, network bridges, modems, networking
cables, line drivers, switches, hubs, and repeaters in networks.
Gateways : Gateways are also called protocol converters, can operate at any network layer. A
gateway is a router in a computer network.
Or we can say that, a major key stopping point for the data on its way to or from other networks,
because of gateways, we are able to communicate and send data back.
Routers : A router is a networking device that can forwards data packets between computer in
networks. Routers do perform the traffic controlling or directing functions on the Internet.
A data packet is forwarded from one router to another router, through the networks that have the
internetwork until it reaches its destination computer or node.
Bridge : A network bridge is a device that connects a local area network (LAN) to another LAN
that uses the same protocol as Ethernet or token ring or any other.
Modems : A modem is a network device or a program, that enables a computer to transmit data
over networking cables, for example : telephone or cable lines or any other.
Computer informations are stored in form of digital, whereas information transmitted over
telephone lines. it is transmitted in the form of analog waves.
Answer 4:
physical media: It is refers to the physical materials that are used to transmit information in data
communications. It is called as physical media because
the media is generally a physical object like as copper or glass. that can be touched and felt, and
it also has physical properties like as weight, color and thikness.
there are many physical devices like as:
1. Twisted pair cables - Twisted pair is the ordinary copper wire that connects home and many
business computers to the telephone company.
There Wire are twisted to avoid crosstalk or any interference for instance, electromagnetic
radiation from cables, and crosstalk between neighboring pairs.
there are two types of Twisted pair cable like as:
a. shielded Twisted pair cable
b. unshielded Twisted pair cable.

2. 2. Coaxial cables - it is the kind of copper cable used by cable TV companies. it is used in
between of antenna and homes and businesses. Coaxial cable is also used by telephone
companies.
Coaxial cable is also called as coax. it is a type of cable that has an inner conductor surrounded
by a tubular insulating layer, an above of that
surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer
sheath or jacket.
3. fiber optics:it is medium or technology associated with the transmission of information as light
form along a glass or plastic wire or fiber. Fiber optic cables allow to carries much more
information than conventional copper wire and is safer in term of electromagnetic interference.