Muddiest Point from 10-27 class

I'm not sure that I completely understand the concept of multiple CSS. Although an example was given in class, under what circumstances would a multiple CSS be desirable? Thanks!

Reading notes for November 3 class

XML-subset of the Standard Generalized Markup Language (SGML)designed to make it easy to interchange structured documents over the Internet. XML allows users to bring multiple files together to form compound documents, identify where images are to be incorporated into text files, provide processing control information to supporting programs, and add editorial comments to a file. XML was not designed to be a standardized way of coding text. It is rather a formal language that can be used to pass information about the compound parts of a document to another computer system. XML is based on concept of documents composed of a series of entities. Each element has certain attributes. To use a set of markup tags that has been defined by a trade association or similar body. Because XML tag sets are based on the logical structure of the document they are somewhat easier to understand. AN XML file normally consists of three types of markup, the first two of which are optional: XML processing instruction, document type declaration, and document instance. By putting data in xml format, you can ensure that your data will be transferable to a wide range of hardware and software environments.

Muddiest Point from October 20 class

Concerning internal anchors, how do you determine what text to put after the "h ref="? Thank you!

Reading Notes for October 27

CSS- Cascading Style Sheets
How to display HTML elements
External style sheets are stored in css files
W3C created CSS
All browsers support CSS
CSS defines how HTML elements are displayed
Has two main parts:
Selector
HTML element you want to style
Declaration
Consists of a property and a value
Property- style attribute you want to change
Each property has a value
Each declaration ends with a semicolon and are surrounded by curly brackets
Can also add comments- do this by starting off code with “/*” and end with */”
Id selector
Used to specify a style for a single, unique element
Demarcate with a # sign
Class selector
used to specify a style for a group of elements.
Demarcate with a “.”
3 ways to inserts CSS
External style sheet
Ideal when applied to many pages
Use the tag
Can be written in any text editor
Shouldn’t contain any html tags
Internal style sheet
Used when a single document has a unique style
Use the tag
Inline style
Not as good as others- loses this by mixing content with presentation

Muddiest point from October 6 class

Is a gateway machine similar to a server in that its main function is not as a traditional operating system but rather as a bridge that links a smaller network with a larger one?

Reading notes for October 13 class

• Internet in its essence is a collection of interconnected networks
• Internet Society oversees the formation of the policies and protocols that define how we use and interact with the internet
• ISP-Internet Service Provider
o ISPs then connect to larger networks that become a part of the internet
• POP- Point of presence, or a place for local users to access the company’s network, often through a local phone # or dedicated line.
o Then high-level networks connect to each other through Network Access Points (NAPs)
• Dozens of large internet providers interconnect at NAPs in various cities and trillions of bytes of data flow between the individual networks at these points.
o Therefore, internet is a collection of huge corporate networks that agree to all intercommunicate with each other at the NAPs.
• Routers determine where to send information from one computer to another
o More specifically, routers are special computers that send your messages along pathways
 Needs to make sure info. goes where it is meant to and not where it is not meant to go
• Internet backbones are fiber optic trunk lines and a trunk line has multiple fiber optic cables that increase the backbone’s capacity.
o Fiber optic cables are classified OC-aka optical carrier
• The four numbers in an IP address are called octets
o These octets are used to make classes of IP addresses that can be assigned to a particular business, etc.
o These octets are split into two sections: Net and Host
 Net-always contains the first octet that ids the network
 Host (or node)- identifies the actual computer on the network
• Domain Name System maps text names to IP addresses automatically
o Ex. .com, .edu
• URL- Universe Resource Locator: http://[etc]
• DNS servers handle billions of requests every day and they are essential to the internet’s smooth functioning
• All of the machines on the internet are either servers or clients
o Those that provide services to other machines are called servers
o And those that request and receive these services are called clients
 Servers have a static IP address that doesn’t change very often
 Any server machine makes it services available using numbered ports
• The client machine then accesses the service using a specific protocol.
• Every web server complies to the hypertext transfer protocol (HTTP)

Assignment 2 links

Here is the link to my jing video tutorial. I chose to design a tutorial on Omeka, which is a program that enables you to create and publish an online exhibit or collection.

Here is the series of links for my annotated screen capture images. I chose to explain how to add a collection to your Omeka site.

http://www.flickr.com/photos/67588344@N07/6209256389/

http://www.flickr.com/photos/67588344@N07/6209266169/

http://www.flickr.com/photos/67588344@N07/6209268491/

http://www.flickr.com/photos/67588344@N07/6209270457/

http://www.flickr.com/photos/67588344@N07/6209271907/

Muddiest Point for September 29 class

If MARC records were created to be an easy and convenient way of storing and exchanging bibliographic records, what systems/software have been developed to facilitate the exchange of such information between institutions?

Reading notes for October 6 class

Local area network reading
• local area network: computer network that interconnect computers in a limited area.
o usually high data-transfer rates
o Ethernet and Wi-Fi are two most common technologies currently used to build them
• Need for these came from increased use of computers at universities and labs
• NetWare was chief network operating system from 1983 to mid 1990s, when Microsoft grabbed a hold of the market
• Wi-fi is now most common technology used with LANs to accommodate laptops and mobile devices
• LANs can have connections with other LANs via leased lines or services across the internet using virtual private network technologies
Computer network reading
• Computer network: often referred to as a network, is a collection of hardware components and computers interconnected by communications channels that allow sharing of resources and information
o Rules and data formats for exchanging information- defined by communications protocols
 Ex. Ethernet, internet protocol suite
• Computer networks: core of modern communication
• Key characteristics of networks:
o Facilitate communications
o Permit sharing of files, data and other types of information
o Share network and computing resources
o May be insecure
o May interfere with other technologies
o May be difficult to set up
• Communications protocol defines the formats and rules for exchanging information via a network
• Ethernet- family of connectionless protocols used in LAMs with a flat addressing scheme.
• Internet Protocol Suite- foundation of all modern internetworking
• Asynchronous Transfer Mode- switching technique for telecommunication networks
o Uses time-division multiplexing and encodes data into small, fixed-sized cells, which makes it different from IPS or Ethernet- which use variable sized packets or frames
o Good choice for network that needs to handle both high-throughput data and real-time, low-latency content such as voice and audio
• Networks- often classified by physical or organizational extent or purpose
o Personal area network: ex. Pcs, printers, fax machines, telephones
o LAN- each computer or device is a node
 All of these connected devices must know the network layer (layer 3)
 Home network- residential LAN
• Backbone Network- part of computer network infrastructure that interconnects various pieces of network and provides a path for exchange of information between different LANs, or subnetworks
• Wide Area Network- large computer network that covers a large geographic area such as a city; uses a communication channel that combines many types of media
o Often uses transmission facilities provided by common carriers- like telephone companies
• Overlay network- virtual computer network that is built on top of another network
o Ex. internet