Font size
WorksheetsNetwork 2
Total questions: 48
Worksheet time: 27mins
The act of transferring information from one place to another
Communication
Network
It is a group of computers (hosts or nodes) that connected to each other to share information
Is a system of hardware, software and transmission components that collectively allow two application programs on two different stations connected to the network to communicate well
Communication
Network
What is network element?
Devices
Medium
Message
Protocol
These are used to communicate with one another
Protocol
Messages
Devices
Medium
This is how the devices are connected together
Devices
Protocols
Messages
Medium
Protocols is the information that travels over the medium
True
False
Messages governs how messages flow across network
True
False
What is Network services?
Data centralization
Sending email
Browsing
Sharing peripheral
Cost reduction
Baseband is signaling divides the network medium into multiple channels allowing several signals to traverse the medium at the same time
True
False
Broadband is allow one signal at a time on the network medium
True
False
In peer to peer network : it can differentiate the client and server
True
False
In peer to peer network : it is can do both response and request their services
True
False
In client/server network : it can't differentiate between client and server
True
False
In client /server network :server response the service which request by client
True
False
LAN
Is a group of computers connected in small geographical area used to allow users to share files and services
High speed of communication
Under your administrative control
Technology used: Ethernet, Token Ring
WAN
is a group of computers connected in Large geographical area.
A WAN often connects two LANs (WAN Link)
Very low Speed
Under your ISP Administrative control
Technology used: Dialup, ISDN, DSL, Frame Relay,
ATM, X.25
is defined as a global mesh of interconnected networks
Internet
Network
communication
defines the way in which computers, printers, and other
devices are connected.
describes the layout of the wire and
devices as well as the paths used by data transmissions.
Network
Internet
network topology
communication
Tree topology
Combines characteristics of linear
bus and star topologies.
- It consists of groups of
star-configured workstations
connected to a linear bus backbone
cable
pros: Easy Expansion.
Easily managed and maintained.
If a network failed the other not affected.
cros: Relies heavily on the main bus cable, if it breaks whole network
is crippled.
The physical topology: describe the way in which message are sent. ( how to send message from device
to other)
True
False
logical topology: describe the physical way the network is wired ( how computers connected to
each other)
True
False
Shielded twisted pair
Protected
Hard to install
Most common
Less expensive
Unshielded twisted pair
Most common
Easy to install
Less expensive
Effected By electromagnetic interference
Protected
Single Mode:
Transfer data through the core using a
single light ray
Supports a large amount of data
Cable length can extended a great
distance
Multi- Mode:
Transfers the data through the core
using multiple light rays
Cable length are limited in distance
compared to single mode
are rules of operation that govern communication between 2 H/W stations
or 2 S/W on different machines.
Internet
Communication
Standards
Network
Standards Typically Focus on Message Exchanges:
Message Format (Syntax)
Message Order (Responses follow Requests)
Message Semantics: Meaning of Each Message
OSI
Open Systems Interconnection
is the primary architectural model for networks.
It is group of concepts that describes how device know how to send data from
hop to hop then end to end
OSI/RM was developed by ISO in 1983
International Organization for Standardization
BENEFITS OF USING A
LAYERED MODEL
It divides the network communication process
into Layers, so easier to troubleshooting.
It allows multiple-vendor development
through standardization of network
components.
It allows various types of network hardware and software to communicate.
Changes in one layer do not affect other layers
because of layer separation
Layers interact with each other.
It is Responsible for assign network process
Transport
Application
Session
Presentation
Session
Establishes, manages and terminates sessions (connections) between
cooperating applications
Controls the sessions between the local and remote applications
Transport
Organize data into segments
Provide reliable transport between end systems (source and
destination hosts)
End-to-end error recovery
End-to-end flow control and ordering
Connection-oriented is UDP
True
False
Connectionless is TCP
True
False
means that a connection (a virtual link) must be established before data can be exchanged.
This can guarantee that data will arrive, It is a form of flow control, and is called
"Windowing".
Connection-oriented
Connectionless
the sender does not establish a connection before it sends
data, it just sends without guaranteeing delivery.
Connection-oriented
Connectionless
Network
Organize data into Packets
It is responsible for the Internet Protocol Addressing (IP)🡪logical address
It know the best path for the destination
End-to-end Addressing
Data link
Reliable data transfer across a physical link
It have the physical addressing 🡪 known as MAC address.
Organize the data into frames, to be put on the physical medium
Check the Frame For errors
Hop to hop addressing, indicates the flow the communication follows. Data pass
through multiple devices with an IP address, and each is genetically named “hop”.
is a circuit board that is installed on a computer to connect to
the network.
(network interface controller) card, also known as a network adaptor
Network
Standard
NIC
NIC
Operate at the physical layer of OSI/RM
The interface between the PC and the network
cable
Resides in the motherboard of the PC
Communicate with the PC through the device driver &
Contain transceiver
It Have A physical Address burned on the card
called Mac address.
Unicast: traffic, many streams of IP packets that move
across networks flow from a single point, such as a
website server, to a single endpoint such as a client PC.
This is the most common form of information transference
on networks.
True
False
Broadcast: In this method traffic recline between the
boundaries of unicast (one point to one destination) and
broadcast (one point to all destinations). And multicast is
a “one source to many destinations” way of traffic
distribution, which means that only the destinations that
openly point to their requisite to accept the data from a
specific source to receive the traffic stream.
True
False
Multicast: traffic streams from a single point to all possible endpoints
within reach on the network, which is generally a LAN. This is the easiest
technique to ensure traffic reaches its destinations.
True
False
HUB: Must work with half duplex communication
True
False
Switch: work with full duplex communication and Mixture of speeds
True
False
ENCAPSULATION
adds information to a
packet as it travels to its destination.
placing a message in the data field of
another message.
VERTICAL COMMUNICATION ON THE SOURCE HOST
Internet Layer Process
Creates an IP packet
Passes the packet down to the data link layer process
Data Link Layer Process
Creates a new frame
Places (encapsulates) the IP packet in the data field of the frame, adding a frame header and
perhaps a trailer
Passes frame down to the physical layer process
Physical Layer Process
Converts the signal into bits of the frame
Passes the frame up to the data link layer process
Data Link Layer Process
Checks the data link layer header (and, if present, trailer)
Decapsulates the IP packet
Passes the packet up to the internet layer process
VERTICAL COMMUNICATION ON THE DESTINATION HOST
Data Link Layer Process
Creates a new frame
Places (encapsulates) the IP packet in the data field of the frame, adding a frame header and
perhaps a trailer
Passes frame down to the physical layer process
Data Link Layer Process
Checks the data link layer header (and, if present, trailer)
Decapsulates the IP packet
Passes the packet up to the internet layer process
Physical Layer Process
Converts the signal into bits of the frame
Passes the frame up to the data link layer process
