Introduction to IT - C182 // Unit 4 Computer Networks

peer-to-peer (P2P)

A computer network that relies on the computing power and bandwidth of the participants in the network rather than a centralized server

What can provide more bandwidth? Coaxial or Optical wire cables

Optical wire cables

What are the MOST common network topologies?

Bus and star

What are the three categories of networks?

Personal area network (PAN), local area network (LAN), wide area network (WAN)

Which technique allows someone to obtain sensitive information, such as usernames and passwords, by pretending to be a trustworthy person?

Phishing is the fraudulent attempt to obtain sensitive information such as usernames, passwords, and credit card details by disguising the source as a trustworthy entity.

What is the minimum grade of network cable required to transmit 1 Gpbs?

CAT5e is the minimum grade of cable necessary to reach speeds of 1Gbps.

What are common network media used in wireless networks?

Radio waves, microwaves, and infrared waves.

What are three types of Distributed system networks.

Cluster, Grid, Cloud Computing

Which type of transmission media can broadcast in baseband mode?

Coax cable can broadcast in both baseband and broadband modes.

Client/Server Model

The basic roles played by the processes are categorized as either a client, making requests, or a server, satisfying client requests.

What is examples of interprocess communication.

The client/server and peer-to-peer model is a popular convention used for interprocess communication.

What are the capabilities of tier 1 ISPs?

Tier 1, at the top of the ISP hierarchy, is the least common type of ISP and serves as the backbone of the internet.

What are the capabilities of tier 2 ISPs?

Tier 2 ISPs are more common and regional in scope. Tier 1 and Tier 2 ISPs are essentially networks of routers that collectively provide the internet's communication infrastructure.

What are common network media used in wired networks?

Twisted pair cables, copper coaxial cables, and optical fiber cables

Coaxial cable transmits information in two modes

baseband mode, with dedicated cable bandwidth, and broadband mode

What do firewall do?

blocks outgoing messages with certain destination addresses or block incoming messages from untrustworthy sources.

What are the capabilities of tier 3 ISPs?

independent internets, sometimes called intranets, operated by a single organization that supplies internet access to homes and businesses.

How does a proxy server function?

it shields a client from adverse actions of the server.

What is HTML?

A way of encoding a document.

What types of waves are used in wireless transmission media?

Infrared or radio waves.

In a network, name a method of process of communication.

Interprocess communication allows the activities or processes on different computers within a network to coordinate actions and complete tasks.

What are the part of the URL?

Protocol, domain, and all subdomains

What is mareware?

Software intentionally created to cause harm. Such as viruses, worms, spyware, phishing

What is the DNS

The domain name system is like a phonebook filled with all the IP addresses and their respective sites' names.

Which network topology best handles downed links without losing connectivity between devices?

The mesh network's redundancy from multiple links allows connectivity even when a link is out of service.