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Questions and Answers
What is the function of a DSLAM in a DSL network?
What is the function of a DSLAM in a DSL network?
Which access network technology provides asymmetric transmission rates?
Which access network technology provides asymmetric transmission rates?
What is the purpose of a cable modem termination system (CMTS) in an HFC network?
What is the purpose of a cable modem termination system (CMTS) in an HFC network?
Which wireless technology is typically used for wide-area wireless access?
Which wireless technology is typically used for wide-area wireless access?
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Which physical media has two concentric copper conductors?
Which physical media has two concentric copper conductors?
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What is a characteristic of fiber optic cables?
What is a characteristic of fiber optic cables?
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In a DSL network, where does voice data over DSL phone lines go?
In a DSL network, where does voice data over DSL phone lines go?
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Which device combines wireless access, routing, firewall, and wired Ethernet capabilities?
Which device combines wireless access, routing, firewall, and wired Ethernet capabilities?
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What is the purpose of an Ethernet switch in an enterprise access network?
What is the purpose of an Ethernet switch in an enterprise access network?
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Study Notes
Network Structure
- The Internet is a network of networks that connect millions of computing devices (hosts) such as PCs, laptops, mobile devices, and smartphones.
- These devices are connected through access networks, links, and physical media (wired and wireless) to the global Internet.
Network Edge
- The network edge consists of end systems (hosts), access networks, and links.
- End systems can be clients, servers, and other devices that run network applications.
- Servers are often located in data centers.
Network Core
- The network core consists of interconnected routers that forward packets of data.
- The network core is a network of networks, where multiple ISPs (Internet Service Providers) are interconnected.
Communication
- Communication occurs through wireless and wired links, including fiber, copper, radio, and satellite transmission.
- Transmission rates are measured in bandwidth.
Protocols
- Protocols are the set of rules that govern data communication over the Internet.
- Examples of protocols include TCP, IP, HTTP, and 802.11.
- Protocols define the format and order of message transmission and reception, as well as the actions taken on message transmission and receipt.
Internet Services
- The Internet provides services to applications, including Web, VoIP, email, games, e-commerce, and social networks.
- The Internet provides a programming interface to applications, allowing them to connect to the Internet and exchange data.
Security
- The Internet is vulnerable to security threats, and security protocols are necessary to protect data transmission.
History of the Internet
- The Internet has a rich history, with its development influenced by various organizations and individuals.
RFC and IETF
- RFC (Request for Comments) is a series of documents that define the Internet standards.
- IETF (Internet Engineering Task Force) is an organization that oversees the development of Internet standards.
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Description
Test your knowledge on network edge, access networks, physical media, network core, packet switching, circuit switching, Internet structure, network performance, security, protocol layers, and service models based on Chapter 1 of a networking textbook.
