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Dos233 / Cisco-Network-Note

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Chapter 1 #1

Open Dos233 opened 5 years ago

Dos233 commented 5 years ago

DSL uses a high-speed modem to split the existing telephone line into voice, download, and upload signal channels. SDSL is a format of DSL that provides business class service featuring the same speeds for uploading and downloading. Cable uses the same coaxial or fiber optic cable that carries television signals into the home to provide Internet access. Satellite requires a clear line of sight and is affected by trees and other obstructions. Cellular access to the internet is provided by the cell phone network. Cellular provides access in areas that otherwise have no other form of access. Metro Ethernet is a dedicated business class of service that connects organizations to the internet via copper or fiber cable at speeds up to 10Gb/s.

Dos233 commented 5 years ago

image Network A is a MAN. It consists of a number of different types of facilities that are connected within the same geographic area. Network B is a LAN. It is located in a limited geographic area in a single building. Network C is a WLAN. It is a LAN in which the devices are connected wirelessly. Finally option D shows a WAN. It is two geographically separate LANs that are connected to the same enterprise.

Dos233 commented 5 years ago

What is ISP? An ISP, or Internet Service Provider, is an organization that provides access to the Internet for businesses and individuals.

Dos233 commented 5 years ago

Virtual private networks (VPN) are used to provide secure access to remote workers.

Dos233 commented 5 years ago

About scalable network :
Scalable networks are networks that can grow without requiring costly replacement of existing network devices. One way to make a network scalable is to buy networking devices that are modular.

Dos233 commented 5 years ago

Fault tolerance is the characteristic of a network which allows it to quickly respond to failures of network devices, media, or services. Quality of service refers to the measures taken to ensure that network traffic requiring higher throughput receives the required network resources. Scalability refers to the ability of the network to grow to accommodate new requirements. Security refers to protecting networks and data from theft, alteration, or destruction. Integrity refers to the completeness of something and is generally not used as a characteristic of networks in the same way as the other terms.

Dos233 commented 5 years ago

About converged network : A converged network unifies different network services, such as streaming video, voice, and data, on a single platform and within a single infrastructure.

Dos233 commented 5 years ago

About BYOD(Bring Your Own Device) : A BYOD environment requires an organization to accommodate a variety of devices and access methods. Personal devices, which are not under company control, may be involved, so security is critical. Onsite hardware costs will be reduced, allowing a business to focus on delivering collaboration tools and other software to BYOD users.

Dos233 commented 5 years ago

WISP(wireless internet service provider) : Wireless Internet Service Providers (WISPs) are typically found in rural areas where DSL or cable access is not available. A dish or antenna on the property of the subscriber connects wirelessly to a WISP transmitter, eliminating the need for physical cabling outside the building.

Dos233 commented 5 years ago

About WAN : A WAN provides access to other networks over a large geographic area. A SAN provides data storage, retrieval, and replication. A MAN spans a limited physical area such as a city. A LAN provides access in a small geographic area.