Unit 3 Review Flashcards
Where are basic input/output system (BIOS) settings saved?
Complementary metal oxide semiconductor (CMOS) memory
What type of power supply is most commonly used in computers today?
Switching
What was developed to enhance a computer’s video subsystem because of the increased performance requirements on high-end PCs?
Accelerated Graphics Port (AGP)
Why is it essential for critical information from hard disk drives to be backed up or copied onto other media?
Disk drives are subject to mechanical failure
What performs the function of displaying the screen you see on a computer monitor?
Graphics/video card
Which operating system (OS) is a clone of Unix?
LINUX
Which action is not a possible result of computer system damage originating from viruses?
Redirecting power supply voltages
What is a common way malicious code can get into your system?
Clicking an e-mail link or attachment
How many traditional Unix directories are there?
7
What directory is the highest-level directory in the Unix file system?
root
What is considered the standard Unix editor?
vi
What layer of the Open Systems Interconnect (OSI) model provides a variety of coding and conversion functions applied to application layer data?
presentation
Who is the governing body for information technology (IT) communications within the Department of Defense (DOD)?
DISA
In positive acknowledgement, what does the sender do?
Keeps a record of each data packet sent and expects an acknowledgement
Flow control methods prevent network congestion by
ensuring transmitting devices do not overwhelm receiving devices with data
Which connection protocol sends out data packets to the receiving system and does not require a receipt acknowledgement?
Connectionless-oriented communication
User Datagram Protocol (UDP) is best for what type of transmission?
Sending small amounts of data where guaranteed delivery is not required
What is the basic communication language or protocol of the Internet?
Transmission Control Protocol/Internet Protocol
What protocol enables Transmission Control Protocol/Internet Protocol (TCP/IP) to Internetwork?
Internet Protocol
In what octet of an Internet Protocol (IP) address can you identify the class of the address?
First
Internet Protocol Version 6 (IPv6) addresses are how much larger than Internet Protocol Version 4 (IPv4) addresses?
Four times larger
What are the three types of Internet Protocol Version 6 (IPv6) addresses?
Unicast, multicast, and anycast
When a client computer initiates contact with a server, what does it use to request a particular service?
Port numbers
What network type is essentially a private Internet for a company or organization?
Intranet
What are Intranets that share a portion of their content with customers, suppliers, or other businesses, but not with the public?
Extranets
A wide area network (WAN) connects networks that are typically separated by
geographical distances
What network topology consists of devices connected to a common or shared cable?
Bus
What network topology consists of cabling segments from each computer connecting to a centralized component?
Star
In what network topology does each workstation act as a repeater for a transmission?
Ring
What device modulates signals to encode digital information and demodulates signals to decode the transmitted information?
Modem
What device logically separates a single network into multiple segments or collision domains in Ethernet networks?
Switch
If a router does not know how to forward a packet, what does it do?
Drops the Packet
In what routing method does a network administrator program a router to use specific paths between nodes?
static routing
What term best describes when a sender locks transmitted information down with a secret combination, or key, and the receiver can unlock the information assuming they have the same key?
encryption
What could happen if you used the wrong type of radio-guide (RG) cable?
Equipment damage or system failure
