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convert number 1111012 = ?16 Step 1: Divide the binary digits into groups 0f four starting from the right 0011 1101 Step 2 Convert each group into a hexadecimal digit 00112 = 0 x 23

• 0x22
• 1 +21 + 1x20 = 310 = 316 112 = 1x 23
• 1x22
• 0 +21 + 1x20 = 1310 = 1316 Converting Binary Number to Hexadecima Number Data Communications ?Data communications are the exchange of data between two devices via some form of nsmission medium such as a wire cable or wireless.?Delivery -> Correct destination ?Accuracy -> Accurate data ?Timelines -> Real-time transmis Data Communications ?ln simplex transmission ,mode communication Can take place in only one .direction ?An example is TV ,Waves we Can watch different channels on TV but there is no need to send any type of signals from TV. Another example is line printer ?Telecommunication refers to long-distance communication.The term data refers to information displayed in any way that the parties creating and using the data agree on. ?Full-duplex Data Transmission Modes ?There are three modes of communication ?lt means the sender will always send & the receiver will always ?A half-duplex System Can transmit data in both ,direction but only in one direction at a time ?Text ?Images ?Audio ?Simplex ?Half-duplex ?Simplex ?Half-Duplex ??Numbers ?Video Data flow ?

convert number 1111012 = ?16
Step 1: Divide the binary digits into groups 0f four starting from the right
0011 1101
Step 2 Convert each group into a hexadecimal digit
00112 = 0 x 23

• 0x22


• 1 +21 + 1x20 = 310 = 316
  112 = 1x 23


• 1x22


• 0 +21 + 1x20 = 1310 = 1316
  Converting Binary Number to Hexadecima Number Data Communications
  ✔ Telecommunication refers to long-distance communication.
  ✔ The term data refers to information displayed in any way that the parties creating
  and using the data agree on.
  ✔ Data communications are the exchange of data between two devices via some form of nsmission medium such as a wire cable or wireless.
  ❖Delivery → Correct destination
  ❖Accuracy → Accurate data
  ❖Timelines → Real-time transmis Data Communications
  ✔ Text
  ✔ Numbers
  ✔ Images
  ✔ Audio
  ✔ Video
  Data flow
  ▪ Simplex
  ▪ Half-duplex
  ▪ Full-duplex Data Transmission Modes
  ✔ There are three modes of communication
  ✔ Simplex
  ❖ ln simplex transmission ,mode communication Can take place in only one .direction
  ❖ lt means the sender will always send & the receiver will always
  ❖ An example is TV ,Waves we Can watch different channels on TV but there is no need
  to send any type of signals from TV. Another example is line printer
  ✔ Half-Duplex
  ❖ A half-duplex System Can transmit data in both ,direction but only in one direction at a
  time
  ❖ It means that at a time one computer Can only send or receive when one device
  completes a ,transmission this device must turn" "over the medium to the other device
  SO that this second device has turn to .transmit .e.g wireless Data Transmission Modes
  ✔ Full-Duplex
  ❖ This mode allows a device to send & receive data simultaneously is called duplex or
  full-duplex .mode
  ❖ This mode provides two Ways to simultaneously data transfer by providing each device
  with a separate communication channel.
  ❖ Voice telephone is full-duplex devices and either party to a conversation can talk at an Types of connections
  ✔ Point to point
  ❖ A dedicated link is provided between two devices
  ✔ Multipoint
  More than two specific devices share a single link Introduction to Network
  ✔ A network is a set of devices (nodes) connected by communication links.
  ✔ A node can be a computer, printer, or any other device capable of sending and/or
  receiving data generated by other nodes on the network.
  ✔ A computer network consists of two or more computing devices connected to each
  other to share resources and information Why Computer Network?
  ✔ To share information or receive a service via a network or group of members able to
  communicate with each other.
  ✔ The concept of connected computers sharing resources is called Networking
  ✔ Computer network that is part of network can share the following
  Data ,Messages ,Graphics ,Printers ,Modem Fax machine other& Hardware resour Applications of Networks
  ✔ Resource Sharing
  ❖ Hardware ( computing resources ,disks , printers)
  ❖ Software (application Software)
  ✔ information Sharing
  ❖ Easy accessibility from anywhere (files) databases)
  ❖ Search Capability (WWW)
  ✔ Communication
  ❖Email
  ❖Message broadcast Networking Hardware
  ✔ Network devices or networking hardware are the physical devices that are used for
  establishing connections and facilating interaction between different devices in a
  computer network.
  ✔ Hub
  ✔ Repeater
  ✔ Bridge
  ✔ Switch
  ✔ Router
  ✔ NIC (Network Interface Card) BUS Topology
  ✔ A multipoint topology
  ✔ All devices are linked through a backbone cable
  ✔ Nodes are connected to the bus cable by drop lines and taps.
  ✔ Drop line
  A connection running between the device and the main cable
  ✔ Tap
  A connector that either splices into the main cable or punctures the sheathing of a
  cable to create a contact with the metallic co