Types of Internet Service Providers

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Questions and Answers

What is the primary function of the infrastructure that provides Internet services?

To provide services to applications

What is the role of a national or global ISP?

To connect local or regional ISPs

What is the purpose of 'hooks' in the Internet infrastructure?

To allow sending and receiving apps to connect to the Internet

What is the analogy used to describe the Internet transport service?

Postal service analogy Signup and view all the answers

What is the term used to describe the inter-connected appliances in the Internet?

Inter-connected appliances Signup and view all the answers

What is the primary function of a local or regional ISP?

To connect to a national or global ISP Signup and view all the answers

What is the term used to describe the Internet's ability to provide services to applications?

Services view Signup and view all the answers

What is the term used to describe the Internet's ability to provide a platform for distributed applications?

Programmatic interface Signup and view all the answers

What type of network connects an end system to a router through a base station?

Wireless local area network (WLAN) Signup and view all the answers

What is the function of a DSL splitter?

To separate voice and data signals Signup and view all the answers

What is the transmission rate of a 802.11b wireless network?

11 Mbps Signup and view all the answers

What is the purpose of a cable or DSL modem?

To connect to the Internet through a ISP Signup and view all the answers

What type of network uses existing telephone lines to provide Internet access?

Digital Subscriber Line (DSL) network Signup and view all the answers

What is the function of a router in a home network?

To connect devices to the Internet Signup and view all the answers

What type of network is typically used in companies, universities, etc.?

Enterprise network Signup and view all the answers

What is the transmission rate of a DSL network?

24-52 Mbps downstream, 3.5-16 Mbps upstream Signup and view all the answers

What connects an enterprise network to an ISP?

Institutional router Signup and view all the answers

What type of network is characterized by a range of 10's km?

Wide-area cellular access network Signup and view all the answers

What is the term used to describe the collection of devices, routers, and links managed by an organization?

Network Signup and view all the answers

What is the primary function of packet switches in the Internet?

To forward packets (chunks of data) Signup and view all the answers

What is the term used to describe the transmission rate of a communication link?

Bandwidth Signup and view all the answers

What is the Internet Engineering Task Force (IETF) responsible for?

Developing Internet protocols Signup and view all the answers

What is the primary function of hosts in the Internet?

To run network applications Signup and view all the answers

What is the term used to describe the Internet's infrastructure?

Network of Networks Signup and view all the answers

What is the protocol responsible for controlling the sending and receiving of messages on the Internet?

All of the above Signup and view all the answers

What is the term used to describe the process of storing data in a data center?

Data Storage Signup and view all the answers

What is the primary function of a national or global ISP?

To provide Internet connectivity Signup and view all the answers

What is the protocol used for streaming video on the Internet?

HTTP Signup and view all the answers

Study Notes

Access Networks

Residential access networks, institutional access networks (schools, companies), and mobile access networks (Wi-Fi, 4G/5G) connect to local or regional ISP.
Home network: wireless and wired devices connect to cable or DSL modem, which connects to ISP via central office.
DSL (Digital Subscriber Line): uses existing telephone line to central office, transmits voice and data at different frequencies.
DSL provides 24-52 Mbps dedicated downstream transmission rate and 3.5-16 Mbps dedicated upstream transmission rate.

Wireless Access Networks

Shared wireless access network connects end system to router via base station (access point).
Wireless local area networks (WLANs) provide 11, 54, or 450 Mbps transmission rate within a building (~30m).
Wide-area cellular access networks provide 10's of Mbps transmission rate over larger areas (10's km).

Enterprise Networks

Enterprise networks connect companies, universities, etc. to ISP via institutional router.
Ethernet switch connects to institutional mail and web servers.

The Internet: A "Services" View

The Internet provides infrastructure for services to applications: Web, streaming video, email, games, e-commerce, social media, etc.
Provides a programming interface to distributed applications, allowing sending/receiving apps to "connect" to and use Internet transport service.

The Internet: A "Nuts and Bolts" View

The Internet is a network of networks, comprising billions of connected devices (hosts/end systems) running network applications.
Packet switches (routers, switches) forward packets (chunks of data) through communication links (fiber, copper, radio, satellite).
Networks are managed by organizations, and transmission rates vary (bandwidth).
Protocols (e.g., HTTP, IP, TCP, Wi-Fi, 4G/5G, Ethernet) control the sending and receiving of messages.

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