WGU D322 INTRODUCTION TO IT UPDATED ACTUAL
LATEST QUESTIONS AND ANSWERS SURE A+
✔✔WAN (Wide Area Network) - ✔✔WANs link systems over a greater distance,
including machines on the opposite sides of the world.
✔✔Four common network topologies - ✔✔Bus, star, ring, and mesh
✔✔Bus network - ✔✔The machines are connected to a common communication line
called a bus. (Connecting several computers in a straight line.)
✔✔Star network - ✔✔Various computers connected in the middle by a router
✔✔Ring network - ✔✔Computers are arranged in a circle with each one connecting to
the computers on either side. Unlike the star diagram, there is no device in the middle to
which they connect. (Connect directly to each other as a peer).
✔✔Mesh network - ✔✔connects every device in a network to every other device; mesh
networks enable redundancy while also introducing significantly more network traffic.
✔✔Client/Server network - ✔✔The basic roles played by the processes are categorized
as either a client making requests or a server satisfying client requests.
✔✔Peer-to-Peer (P2P) - ✔✔the basis of file-sharing services, a computer
communications model and network whose computers are considered equal peers who
can send, store, and receive information equally well
✔✔Distributed Systems - ✔✔Interactions between computers via networks have
become commonplace and multifaceted. Many modern systems, such as global
information retrieval systems or computer games, are designed as distributed systems.
Distributed systems execute software as processes on more than one computer.
, ✔✔Clustering computing - ✔✔Use many independent computers to provide
computations or services comparable to those of a larger machine. The cost of several
individual machines can be less than a higher-priced supercomputer, with comparable
performance.
✔✔Grid computing - ✔✔Typically includes specialized software to make it easier to
distribute the workload and data among the machines in the grid.
✔✔Cloud computing - ✔✔Provides large pools of shared computers that can be
allocated to clients as needed. Services such as Amazon's Elastic Compute Cloud allow
clients to rent virtual computers by the hour no matter where the associated computer
hardware is located.
✔✔IPv4 - ✔✔32bit address pattern (e.g., 192.207.177.103)
✔✔IPv6 - ✔✔128bit address pattern (e.g., 2001:DB8:12:34::1111)
✔✔ICANN (International Corporation for Assigned Names and Numbers) - ✔✔A non-
profit organization that coordinates the internet's operations
✔✔HTTP (Hypertext Transfer Protocol) - ✔✔the protocol used for transmitting web
pages over the Internet
✔✔SMTP (Simple Mail Transfer Protocol) - ✔✔A communications protocol that enables
sending email from a client to a server or between servers.
✔✔POP (Post Office Protocol) - ✔✔an email protocol that stores and downloads
messages to a client
✔✔IMAP (internet mail access protocol) - ✔✔A more recent and advanced electronic
email system for incoming mail.
✔✔VoIP (Voice over Internet Protocol) - ✔✔protocol that transmits phone calls over the
same data lines and networks that make up the Internet; also called Internet telephony
✔✔Hypertext Markup Language (HTML) - ✔✔links documents, allowing users to move
from one to another simply by clicking on a hot spot or link
✔✔Web Server - ✔✔A computer that runs special software to serve up Web content by
responding to requests.
✔✔URL (Uniform Resource Locator) - ✔✔A location or address identifying where
documents can be found on the Internet, a Web address
LATEST QUESTIONS AND ANSWERS SURE A+
✔✔WAN (Wide Area Network) - ✔✔WANs link systems over a greater distance,
including machines on the opposite sides of the world.
✔✔Four common network topologies - ✔✔Bus, star, ring, and mesh
✔✔Bus network - ✔✔The machines are connected to a common communication line
called a bus. (Connecting several computers in a straight line.)
✔✔Star network - ✔✔Various computers connected in the middle by a router
✔✔Ring network - ✔✔Computers are arranged in a circle with each one connecting to
the computers on either side. Unlike the star diagram, there is no device in the middle to
which they connect. (Connect directly to each other as a peer).
✔✔Mesh network - ✔✔connects every device in a network to every other device; mesh
networks enable redundancy while also introducing significantly more network traffic.
✔✔Client/Server network - ✔✔The basic roles played by the processes are categorized
as either a client making requests or a server satisfying client requests.
✔✔Peer-to-Peer (P2P) - ✔✔the basis of file-sharing services, a computer
communications model and network whose computers are considered equal peers who
can send, store, and receive information equally well
✔✔Distributed Systems - ✔✔Interactions between computers via networks have
become commonplace and multifaceted. Many modern systems, such as global
information retrieval systems or computer games, are designed as distributed systems.
Distributed systems execute software as processes on more than one computer.
, ✔✔Clustering computing - ✔✔Use many independent computers to provide
computations or services comparable to those of a larger machine. The cost of several
individual machines can be less than a higher-priced supercomputer, with comparable
performance.
✔✔Grid computing - ✔✔Typically includes specialized software to make it easier to
distribute the workload and data among the machines in the grid.
✔✔Cloud computing - ✔✔Provides large pools of shared computers that can be
allocated to clients as needed. Services such as Amazon's Elastic Compute Cloud allow
clients to rent virtual computers by the hour no matter where the associated computer
hardware is located.
✔✔IPv4 - ✔✔32bit address pattern (e.g., 192.207.177.103)
✔✔IPv6 - ✔✔128bit address pattern (e.g., 2001:DB8:12:34::1111)
✔✔ICANN (International Corporation for Assigned Names and Numbers) - ✔✔A non-
profit organization that coordinates the internet's operations
✔✔HTTP (Hypertext Transfer Protocol) - ✔✔the protocol used for transmitting web
pages over the Internet
✔✔SMTP (Simple Mail Transfer Protocol) - ✔✔A communications protocol that enables
sending email from a client to a server or between servers.
✔✔POP (Post Office Protocol) - ✔✔an email protocol that stores and downloads
messages to a client
✔✔IMAP (internet mail access protocol) - ✔✔A more recent and advanced electronic
email system for incoming mail.
✔✔VoIP (Voice over Internet Protocol) - ✔✔protocol that transmits phone calls over the
same data lines and networks that make up the Internet; also called Internet telephony
✔✔Hypertext Markup Language (HTML) - ✔✔links documents, allowing users to move
from one to another simply by clicking on a hot spot or link
✔✔Web Server - ✔✔A computer that runs special software to serve up Web content by
responding to requests.
✔✔URL (Uniform Resource Locator) - ✔✔A location or address identifying where
documents can be found on the Internet, a Web address
