Cisco Q1 Flashcards
IP address
Internet protocol address
The email server runs email server software. Clients use mail client software, such as Microsoft outlook, to access on the server.
Client and server software usually run on separate computers, but it is also possible for one computer to be used for both roles at the same time.
In small businesses and homes, many computers function as the servers and clients on the network. This type of network is called a peer-to-peer network.
Peer-to-Peer
USB
Universal Serial Bus
NIC
network interface card
The network devices that people are most familiar with are end devices. To distinguish one end device from another, each end device on a network has an address
End Devices
. They can connect multiple individual networks to form an internetwork
Intermediary Devices
Intermediary network devices perform some or all of these functions:
Regereate and retransmit communication signals
Maintain information about what pathways exist through the network and internetwork
Notify other devices of errors and communication failures
Direct data along alternative pathways when there is a link failure
Classify and direct messages according to priorities
Permit or deny the flow of data, based on security settings
Network Media
Communication transmits across a network on media. The media provides the channel over which the message travels from source to destination
Data is encoded into electrical impulses.
Metal wires within cables
Data is encoded into pulses of light.
Glass or plastic fibers within cables (fiber-optic cable)
Data is encoded via modulation of specific frequencies of electromagnetic waves.
Wireless transmission
Network architects and administrators must be able to show what their networks will look like.
Network Representation
A NIC physically connects the end device to the network.
Network Interface Card
A connector or outlet on a networking device where the media connects to an end device or another networking device.
Physical port
Specialized ports on a networking device that connect to individual networks. Because routers connect networks, the ports on a router are referred to as network interfaces.
Interface
are mandatory documentation for anyone working with a network. They provide a visual map of how the network is connected. There are two types of topology diagrams: physical and logical.
Topology diagrams
topology diagrams illustrate the physical location of intermediary devices and cable installation, as shown in the figure.
Physical topology diagrams
topology diagrams illustrate devices, ports, and the addressing scheme of the network, as shown in the figure.
Logical topology diagrams
networks allow people to work from home, or a remote office. Many self-employed workers use these types of networks to advertise and sell products, order supplies, and communicate with customers
Small office and home office
is the largest network in existence. In fact, the term internet means a “network of networks”. It is a collection of interconnected private and public networks.
The internet
LAN
Local area networks
WAN
Wide area networks
ISP
Internet service provider
Typically offered by cable television service providers, the internet data signal transmits on the same cable that delivers cable television. It provides a high bandwidth, high availability, and an always-on connection to the internet.
Cable
Digital Subscriber Lines also provide high bandwidth, high availability, and an always-on connection to the internet.
DSL
