Ver_4_CCNA1_Module_2_study_guide - SEMESTER 1 CHAPTER 2...

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SEMESTER 1 CHAPTER 2 Communicating over the Network V 4.0 2.0.1 What are the five aspects of the information network we will focus on in this course? Devices that make up the network Media that connect the devices Messages that are carried across the network Rules and processes that govern network communications Tools and commands for constructing and maintaining networks 2.1.1 What are the three elements of communication? Source, channel and destination What is the definition of the term network for this course? data or information networks capable of carrying many different types of communications, including traditional computer data, interactive voice, video, and entertainment products. 2.1.2 What would happen to the network if a message was sent as one massive continuous stream of bits? No other data could be transmitted at the same time plus, if even one station in the network failed, the whole process would have to start over. Define segmentation of messages division of the data stream into smaller pieces What are the 2 advantages of segmentation? Multiple data transmissions at once and multiple pathways to travel What is multiplexing? process used to interleave the pieces of separate conversations together on the network 2.1.3 What is hardware on a network? Devices and media; the physical elements of the network. 2.1.4 What are end devices on a network? These devices form the interface between the human network and the underlying communication network. What is the definition of a host? The end device used for data transmittal and reception What is the definition of a server? hosts that have software installed that enables them to provide information and services, like e-mail or web pages, to other hosts on the network. What is the definition of a client? Computer system that accesses a service from another computer remotely via the network 2.1.5 List examples of intermediary devices. Network Access Devices (Hubs, switches, and wireless access points) Internetworking Devices (routers) Communication Servers and Modems Security Devices (firewalls)
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List examples of process that intermediary devices perform. Regenerate and retransmit data signals Maintain information about what pathways exist through the network and internetwork Notify other devices of errors and communication failures Direct data along alternate pathways when there is a link failure Classify and direct messages according to QoS priorities Permit or deny the flow of data, based on security settings 2.1.6 What are the 3 primary types of media used in modern networks?
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  • Spring '09
  • Rusty
  • Internet Protocol Suite, network access layer, protocol stack

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