Chapter 3: Transmission & Networking Media Flashcards
What kind of channel does broadband transmission use?
Bandpass channel
What is simplex mode of communication?
Only one sender and receiver.
The frequency range of a channel is 4000hz to 6500hz. What is the bandwidth?
2500 hz
The link efficiency of a channel is 0.2 and bandwidth is 4000hz. What is the throughtput?
800hz
What is the link efficiency of full duplex?
More than 50%
Which of the following connectors are also used with multimode and single-mode fiber optic cables for accessing gigabit ethernet?
MT-RJ
Which is a standard connector for unshielded twisted pair cable that resembles RJ-11 telephone jacks?
RJ-45
Which of the following media is comparatively cheaper, lighter, and easier to install?
Twisted pair cable
CAT 3 and CAT 5 belong to which of the following cable categories?
Shielded twisted pair cable
Which of the communication channel types would be the ideal choice for making a phone call?
Full-duplex
Which of the communication channel types allows for information to flow in both directions at the same time?
Full-duplex
bandwidth
The theoretical speed of your data
throughput
the actual speed of your data
About computers and the internet, what is an appropriate analogy for throughput?
Throughput is like a clogged artery
Many family members using the network connection at the same time reduces:
Throughput
What does Mbps stand for?
megabits per second
What is the most common cable type to connect a home network to a cable modem using an internet service provider?
Coaxial
When internet service providers use fiber optic cables, which cable type are they most likely to use for home networks?
Plastic optical cable
What is the main advantage of using a shielded twisted pair (STP) cable for a network connection?
To cut back on electrical interference
What is the main purpose of having a twisted pair cable?
To reduce electromagnetic interference from outside sources
In unshielded twisted pair cables, which category starts being able to push gigabit network speeds (1000+ Mbps)?
CAT5e
An advantage of optical fiber over traditional copper wiring is:
Less bulk
Optical fiber cable provides a higher transmission speed than copper wiring because:
Light moves faster than an electrical signal
The type of fiber used typically for long-distance runs is:
Single-mode
Which part of an optical fiber cable reflects light back into the core as the cable bends?
Cladding
The core strand of an optical fiber can be made of what type of material?
Glass or Plastic
Which internet protocol is responsible for re-transmitting lost or erroneous data packets?
TCP
Which internet protocol is responsible for moving data packets along the Internet network?
IP
An IPv4 address contains _____ digits in _____ sets separated by a _____.
3; 4; period
IPv4 requires that every system with connectivity to the Internet have a unique _____ internet address.
32-bit
The organization that currently regulates and manages the Internet is _____.
ICANN
Which organization is the precursor to ICANN?
IANA
In reference to internet domain names, a registrar is _____.
A company that sells domain names
Which protocol is suited for the current Internet?
TCP/IP
What is the primary use for UDP?
Streaming
UDP is what type of protocol?
Connectionless
Controlling congestion with UDP is:
Up to the application
Who was responsible for the creation of the UDP protocol?
David Reed
Access a website by entering the _____ or _____ into the address bar of the Internet browser.
URL, IP address
URL is an acronym for __________.
Uniform Resource Locator
What will happen if you enter the IP address 142.250.191.206 into your web browser?
Google.com
A _____ is two or more computers that communicate with one another.
network
A computer can be accessed over the Internet via a host name or _____
IP address
DNS servers use _____ servers to help resolve IP addresses to Domain Names
Authoritative servers
DNS is an acronym for:
Domain Name System
Authoritative name servers respond to queries from
recursive name servers
_____ is an example of a TLD name.
.com
When a user first makes a DNS query by typing the domain name into the web browser
The local DNS cache is queried
To manage a given network, we require
SNMP
What is the purpose of FTP?
To transfer a file in a network.
Which protocol downloads a copy of an email and deletes the original email from the server?
POP3
