Name: Date: Northampton Community College CISC 231 – Data Communications and LANs (CCNA 1) STUDY GUIDE FOR CHAPTER 2 1. What is the purpose of a network protocol? A network protocol defines rules and conventions for communication between network devices. Protocols for computer networking all generally use packet switching techniques to send and receive messages in the form of packets. 2. Define the role of an intermediary device in the network. Communication to run smoothly across
Premium Computer network Local area network Computer
Vocabulary Exercise: Matching Term | Definition | a. Frame | a. Two or more devices connected to a common medium | b. Node | d. A layer of the Open Systems Interconnection (OSI) model that frames upper-layer data and controls how data is placed on a medium | c. Media | b. A device on a network | d. Network | e. The physical means used to carry data signals | e. Data Link | c. The protocol data unit (PDU) used in Layer 2 of the OSI model | Concept Questions 1. What are the two main jobs of
Premium Ethernet OSI model Internet Protocol Suite
direction. b. A fiber-optic cable or cord carrying a single fiber. Simplex cordage is mainly used for patch cords and temporary installations 5. Half-Duplex – A system in which signals may be sent in two directions‚ but not at the same time. In a half-duplex system‚ one end of the link must finish transmitting before the other end may begin. 6. Full-Duplex – A system in which signals may be transmitted in two directions at the same time. 7. Photodiode – A component that converts light energy into electrical
Premium Optical fiber Refractive index Total internal reflection
point directly to individual buildings such as residences‚ apartment buildings and businesses to provide unprecedented high-speed Internet access. Simplex- allowing telecommunication in only one direction Half-Duplex- the transmission of data in just one direction at a time Full-Duplex- Refers to the transmission of data in two directions simultaneously Photo-diode- A light-activated semiconductor device that allows current to flow in only one direction. Amplitude Modulation- modulation of the
Premium Refraction Optical fiber Total internal reflection
Microcontroller Interfacing Techniques Document Revision: 1.01 Date: 3rd April‚ 2005 16301 Blue Ridge Road‚ Missouri City‚ Texas 77489 USA Telephone: 1-713-283-9970 Fax: 1-281-416-2806 E-mail: info@bipom.com W eb: www.bipom.com This document is available for download from www.bipom.com Overview Micro-controllers are useful to the extent that they communicate with other devices‚ such as sensors‚ motors‚ switches‚ keypads‚ displays‚ memory and even other micro-controllers. Many interface
Premium
As students‚ we really benefit from such device for in times of projects‚ reports‚ and assignments we greatly rely on such output which we refer to as hard copy. There are five features of a printer ---- its resolution‚ color‚ speed‚ memory and duplex printing. Resolution is the measure of the clarity of images produced that is measured in dpi (dots per inch). Printers designed for personal use average 1‚200 dpi. The higher the dpi‚ the better the quality of image produced. Color capability is
Premium Inkjet printer
Contents Subnetting Discussion Network Drawing Router Configuration Table ACME R1 ACME R2 OMEGA R1 Hostname ACME_R1 ACME_R2 OMEGA_R1 Console Password Cisco Cisco Cisco Secret Password Cisco Cisco Cisco VTY Password Cisco Cisco Cisco Serial 0/0 IP Address/Subnet Mask 144.2.21.66/30 144.2.21.65/30 144.2.21.69/30 Serial 0/0 Clockrate 64000 64000 64000 Serial 0/0 Description Connection to ACME_R2 Connection to ACME_R1 Serial port OMEGA_R1
Premium IP address Routing Routing protocol
synchronization. Dialog control. Decide whose turn it is to talk. The session layer allows two systems to enter into a dialog. It allows the communication between two processes to take place in either simplex (one way only)‚ half-duplex (one way at a time) or full-duplex (two ways at a time) mode. Synchronization. Move the two session entities into a known state. The session layer allows a process to add checkpoints‚ or synchronization points‚ to a stream of data. For example‚ if a system is sending
Premium OSI model
communications where one party is the transmitter and the other is the receiver. An example of simplex communications is a simple radio‚ which you can receive data from stations but can’t transmit data. 5. Half-Duplex: Refers to the transmission of data in just one direction at a time. 6. Full-Duplex: Refers to the transmission of data in two directions simultaneously 7. Photodiode: component that light energy into electrical energy. Receiving end of fiber optic connection 8. Amplitude Modulation:
Free Light Refraction Snell's law
processes • Week 7:* Power spectral density‚ Gaussian process • Week 8:* Modulation: amplitude‚ phase and frequency • Week 9:* Encoding of binary data‚ NRZ‚ NRZI‚ Manchester‚ 4B/5B & % ’ $ • Week 10:* Characteristics of a link‚ half-duplex‚ full-duplex‚ Time division multiplexing‚ frequency division multiplexing • Week 11:*
Premium Information theory Modulation Digital signal processing