Chapter 3: Networks and Clouds Flashcards by Sara P

What are the 4 types of network?

1)Personal area network (PAN)
2)Local area network (LAN)
3)Wide area network (WAN)
4)Internet

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What is a computer network?

Collection of computer that communicate with one another over transmission lines and wireless connections

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What is a PAN?

Personal area network: devices connected around a single person

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What is LAN?

Local area network: connected around a single site (small office/home)

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What is WAN?

Wide area network: connection between multiple sites

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What is the Internet?

A network of networks

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What is Intranet?

Private internet used exclusively withink organization

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What are the 3 wireless options?

1)Bluetooth
2)Wi-Fi
3)Cellular netwrok

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What is Bluetooth?

Wireless communication method that transmit data over short distances

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To what network is Wi-Fi connected to ?

Local area network (LAN)

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What type of network does cellular network use

Wide area network (WAN) and radio signals

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When you connect a LAN to the internet, you connect to an… ?

Internet service provider (ISP)

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What is a digital subscriber line ?

DSL: same lines as voices telephones, but operates so that its signals do not interfere with voice telephone service

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What is a protocol?

Set of rules used by 2 communicating services

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What is the Ethernet?

IEEE 802.3 protocol for LAN connections

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What are the 3 types of protocols?

1)TCP/IP protocol architecture
2)Hypertext transport protocol (HTTP)
3)IP (Internet protocol)

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What is hypertext transport protocol?

Protocol used between browsers/web servers

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What is the secure version of hypertext transport protocol?

Https

What is the Internet protocol?

Identifies and adress for every device connected to Internet (uniquely identifies location)

What is markup language?

system for annoting a document in a way distinguishable from text (+ common)

What is the Hypertext markup language (Html)?

Most common for layout of web pages, defines fonts/layouts of all elements on pages of website)

What does extensible markup language do?

Enables exchange of structured data over the web, machine readable

What does service oriented architecture provide? (SOA)

Way for apps on network to talk to each other, help move data along internet

What are the 2 general ways data moves?

1)Carriers
2)Internet of Things

What are carriers?

Internet backbone, large WAN operated by telecommunication providers

What is the Internet of Things?

collection of objects connected to Internet that communicate & share data purpose

What are the 3 tier architecture?

1)user tier (computer/phone, ect) 2)Server tier (computer that runs web servers) 3)database tier (computer that runs databse management system)

What are architecture tiers?

Arrangement of users computers/servers into tiers

What are web servers?

Software programs that run on server tier computer and that manage https traffic by sending/receiving web pages to/from clients

What is a web farm?

web sites supported by several webserver computers in a facility

What is The Cloud?

Elastic leasing of pooled computer ressources over the internet

What is the term ¨elastic¨ in the Cloud ?

Amount of resources leased that can be increased/decreased dynamically, programmatically, in short spam of time and that organization pay for just the ressources that they use

What is the cloud advantages? (6)

1)Small capital requirement 2)Known cost structure 3)Responsive to fluctuations in demand 4)strong security and disaster response 5)Less cost due to economy of scale 6)Less IT staff and personnel to train acquire

What are the In-House advantages? (4)

1)Control of data 2)No dependence on vendor 3)Flexibility 4)Visibility of security and disaster response

Why is the cloud only used now while it was around since 1960?

Bc technology of that time did not favor and use of enormous data centers

What are the 2 factors that have made cloud-based hosting advantaging?

1)Processors, data communication, data storage are so cheap as to be nearly free 2)Adv in service oriented architecture and protocol adoption have made the cloud even more economical, transparent and convenient

What is outsourcing?

Process of hirng another organization to perform service to reduce costs, gain expertise or free management time

What are the public cloud options? (3)

1)SAAS (software as a service) 2)PAAS (Platform as a service) 3)IAAS (Infrastructure as a service)

What does Software as a service (SAAS) provide?

provides not only hardware infrastructure but also an operating system and app programs on top of that hardware.

What does platform as a service (PAAS) provide?

vendors provide hosted computers, an operating system, and possibly a DBMS

What does infrastructure as a service (IAAS) provide?

the cloud hosting of a bare server computer or disk drive.

What are 2 other cloud options expect from the public ones?

1)Private cloud 2)The Next Cloud (Edge computing)

What is the private cloud?

Cloud owned and operated by an organization for its own benefit. also called an on-premise cloud, is elastic and Internet based but not pooled with other organizations. (gov agencies, required by law)

What is the Next Cloud/Edge computing ?

Edge computing enables computing/data storage near where it's needed