Chapter 10 Flashcards
What is peering?
Peering is the arrangement of traffic exchange between Internet service providers (ISPs). Larger ISPs with their own backbone networks agree to allow traffic from other large ISPs in exchange for traffic on their backbones. They also exchange traffic with smaller ISPs so that they can reach regional end points.
What is point of presence?
An artificial demarcation point or interface point between communicating entities.
What is local loop?
The physical link or circuit that connects from the demarcation point of the customer premises to the edge of the common carrier or telecommunications service provider’s network.
What is DSL?
Digital Subscriber Line is a wireline transmission technology that transmits data faster over traditional copper telephone lines already installed to homes and businesses. DSL-based broadband provides transmission speeds ranging from several hundred Kbps to millions of bits per second (Mbps). The availability and speed of your DSL service may depend on the distance from your home or business to the closest telephone company facility.
What is cable modem?
A service that enables cable operators to provide broadband using the same coaxial cables that deliver pictures and sound to your TV set. Most cable modems are external devices that have two connections: one to the cable wall outlet, the other to a computer. They provide transmission speeds of 1.5 Mbps or more.
What is ADSL?
Asymmetrical DSL is used primarily by residential customers, such as Internet surfers, who receive a lot of data but do not send much. ADSL typically provides faster speed in the downstream direction than the upstream direction. ADSL allows faster downstream data transmission over the same line used to provide voice service, without disrupting regular telephone calls on that line.
What is SDSL?
Symmetrical DSL is used typically by businesses for services such as video conferencing, which need significant bandwidth both upstream and downstream.
What is a gigapop?
A network access point that supports data transfer rates of at least 1 Gbps.
How does symmetric-key encryption work?
Each computer has a secret key (code) that it can use to encrypt a packet of information before it is sent over the network to another computer. Symmetric-key requires that you know which computers will be talking to each other so you can install the key on each one.
What is fiber to home?
Fiber-optic cable that runs into the home using telephone lines where data is transmitted downstream using wavelength division multiplexing.
What is tele-immersion videoconferencing?
Real-time two way remote communication in which each party gets audio and three dimensional visual
What is Internet 2?
A testing-ground networking environment where universities, companies, and government laboratories work together and develop advanced Internet technologies.
What is an IXP?
An Internet Exchange Point is a physical infrastructure through which Internet service providers exchange traffic between their network.
What is an ISP?
An Internet Service Provider is an organization that provides services accessing and using the Internet organized in various ways.
What is a tier 1 ISP?
Exchange traffic based on peering agreement. Provides services across regions.
