Exam (elaborations)
WGU D315 Network and Security Foundations Exam 284 Questions with Verified Answers,100% CORRECT
- Course
- Institution
WGU D315 Network and Security Foundations Exam 284 Questions with Verified Answers
[Show more]
Content preview
WGU D315 Network and Security Foundations Exam 284Questions with Verified Answers
TCP/IP - CORRECT ANSWER model that is a common set of protocol standards
that permits the appropriate transmission of data; used for practical application
when locating specific protocol
TCP/IP layers - CORRECT ANSWER application, transport, network, network
interface
OSI - CORRECT ANSWER model that enables transmission of data among hosts on
a network; widely used in network documentation and discussions
OSI layers - CORRECT ANSWER Application, Presentation, Session, Transport,
Network, Data Link, Physical
Open Systems Interconnection (OSI) - CORRECT ANSWER OSI acronym
TCP and OSI - CORRECT ANSWER set of procedures that sends data from one host
to another. Can be done over the internet, network, or any form of
communication
TCP Network Interface Layer - CORRECT ANSWER Physical cabling and wireless
spectrum
OSI - Physical Layer - CORRECT ANSWER cables and connectors; establishes how a
signal is transmitted via wires or airwaves; responsible for the physical
connections of the devices in a network; use hubs, repeaters, modem devices and
cabling
OSI - Data link layer - CORRECT ANSWER contains network card and Media Access
Control (MAC) address; responsible for error-free delivery of data to the receiving
device or node; switches, bridges, or wireless/wired network cards
,Network Layer (TCP and OSI) - CORRECT ANSWER Internet Protocol and Internet
Control Message Protocol (ICMP); define one protocol versus another for
connecting networks
Transport Layer (TCP and OSI) - CORRECT ANSWER ensures data is transferred to
the correct application; Transmission Control Protocol (TCP) or User Diagram
Protocol (UDP)
Transmission Control Protocol (TCP) - CORRECT ANSWER type of transport layer;
verifies data and resends if not delivered
User Diagram Protocol (UDP) - CORRECT ANSWER type of transport layer;
unreliable to the extent that it does not guarantee redelivery of the data;
preferred in audio streaming
TCP - Application Layer - CORRECT ANSWER HTTP for a web broswer; SMTP for
email; DNS; Secure Shell (SSH); network time protocol (NTP); communication
protocol between nodes
OSI - Session Layer - CORRECT ANSWER establishes the session and ensures things
are working correctly end-to-end
OSI - Presentation Layer - CORRECT ANSWER takes care of data encryption;
translating data from the application layer into format required to transmit data;
OSI - Application Layer - CORRECT ANSWER HTTP; DNS; File transfer protocol
(FTP); responsible for network application; production of data to be transferred
over the network
OSI layers by number - CORRECT ANSWER Physical 1; Data Link 2; Network 3;
Transport 4; Session 5; Presentation 6; Application 7
TCP Transport Layer - CORRECT ANSWER responsible for end-to-end transport
data; TCP and UDP
,TCP Network Layer - CORRECT ANSWER logical transmission protocols for the
whole network; IP, Internet Control Message Protocol (ICMP), address resolution
protocol (ARP)
TCP Network Interface Layer - CORRECT ANSWER establishes how the data should
be physically sent through the network
OSI - Network Layer - CORRECT ANSWER responsible for the transmission of data
between hosts in different networks as well as routing data packets; use routers
and some switches
OSI - Transport Layer - CORRECT ANSWER receives services from network layer
and provides services to the application layer; responsible for reliable delivery of
data; segments and reassembles data in the correct order for it to be sent to the
receiving device; handle reliable delivery of data that are lost or corrupted (TCP
does this); heart of OSI
Switch - CORRECT ANSWER found with OSI data link; standalone or integrated
with other devices; keeps traffic between the source and destination ports from
interfering with other devices on the network;
Router - CORRECT ANSWER found with OSI network layer; connect home network
to the internet; connect web server to database server;
Firewalls - CORRECT ANSWER found in OSI layers data link, network, transport,
session, and application; defines what traffic should go between two networks;
can be software that runs in virtual machine or physical server like hardware
Firewall Layer 4 - CORRECT ANSWER operates the network and transport layers;
Firewall Layer 7 - CORRECT ANSWER operates at session, presentation, and
application layers; decrypt and analyze the content flowing through
Modem - CORRECT ANSWER A device necessary for sending and receiving data.
Allows computers to transport digital information over analog lines, such as
phone or cable lines; DSL or satelite; found in data link and physical
, Repeater - CORRECT ANSWER A device used to strengthen, replicate, and
regenerate signals that are weakened during transmission; range extender is a
form that takes distored Wi-Fi signal and transmits it to the formerly dead zone in
large homes
Hub - CORRECT ANSWER device that connects the router to the network; takes
the data packets from the router and sends them to all devices connected on the
network (e.g. USB hub)
Unshielded Twisted Pair (UTP) - CORRECT ANSWER the tighter the twists of
cables, the lesser electrical interference that occurs and higher the category of
the cable
Cat 3 cables - CORRECT ANSWER oldest UTP; analog phones; 10 mbps
Cat 4 cables - CORRECT ANSWER Token ring cabling. Speeds of 16Mbps
Cat 5 cables - CORRECT ANSWER cable used in 90s and early 2000s; used in
ethernet LANs environments; 100 mbps over 100 meters
Cat 5e cables - CORRECT ANSWER cable that supports gigabit speeds
Cat 6 - CORRECT ANSWER cabling used today; 1 gbps up to 100 meters or 10 gbps
up to 55 meters
Fiber optic cabling - CORRECT ANSWER use light; faster and more durable than
UTP; transfers data digitally; allow virtually no interference
Single-mode cabling - CORRECT ANSWER support narrow range of wavelengths
and higher bandwidths; ideal for submarine cabling across continents; used for
longer distances
Multi-mode cables - CORRECT ANSWER cheaper that single-mode across shorter
distances; from 50 to 100 microns; can run up to a couple thousand meters to a
mile; generally used in LANs
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller paulhans. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79373 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now