Lecture 3: Networks and Web Pages Flashcards
What is block styling?
When an element takes the entire width of the screen?
What kind of styling does <span> use?</span>
inline
What is the escape symbol used for less than (
<
What is the escape symbol for greater than (>)?
>
What is synchronous communication?
When there is a message sent, there must be feedback from the receiver in order to continue the conversation
What asynchronous communication?
Messages can be sent back and forth at any time
What does ISP stand for?
Internet Service Provider
What is a channel?
A communications medium
ex. a router or modem
What is a protocol?
Rules to be followed in the communication process
What is point to point communication?
One sender, one receiver
What is the backbone?
An enormous pipe that connects countries to internet
What is WAN?
Wide Area Network - countries, large regions
What is MAN?
Metropolitan Area Network - Cities
What is LAN?
Local Area Network - Office, home
What is the role of the client?
To request data
What is the role of the server?
To handle and serve requests
Can a server also be a client?
Yes
Everything on the internet has an _________.
Address
What is the DNS?
The Domain Name System
What does the DNS do?
They are servers which are solely in charge of resolving hostnames into IP addresses and vice versa. They are registries
What does IP in IP address stand for?
Internet Protocol
What is an IP packet?
A packet of information that holds pieces or chunks of data.
What is TCP/IP?
Transmission Communication Protocol/Internet Protocol
What does the TCP/IP do?
It dictates how different connections are to be established and how devices are to communicate with each other.
What is ethernet?
When machines are physically connected via wires
What are topologies?
The way that ethernet can be physically arranged
What do routers do?
They connect networks together and plan the route to follow
What do switches do?
They pass traffic along connected LANs
What is caching?
When a DNS finds and returns an IP address, it stores that IP address in memory so it can serve the request faster next time
What is redundancy?
When one server fails on a certain level another one can take over or handle the loads of queries
What is the system in which our operating system organizes files?
A hierarchical tree
What do tags do in HTML?
They are used to define the structure of a web page
When using the img tag we also need to include an _______.
alt tag
What are the 3 ways CSS can be applied ?
- Within the head document
- Inline
- Externally linked
What format does CSS always follow?
element-selector {
property: value;
}
The closer a style is to the element the stronger it is in the applying chain.
True or False?
True
