WGU C172 Network and Security Foundations Exam Questions With Correct Answers

WGU C172 Network and Security
Foundations Exam Questions With
Correct Answers
OSI |Layer |1 |- |Physical |- |CORRECT |ANSWER✔✔-Physical |Layer: |This |layer |is |responsible |for |the |
physical |connections |of |the |devices |in |the |network. |This |layer |is |implemented |through |the |use
|of |devices |such |as |hubs, |repeaters, |modem |devices, |and |physical |cabling.




OSI |Layer |2 |- |Data |Link |- |CORRECT |ANSWER✔✔-Data |Link |Layer: |This |layer |is |responsible |for |
the |error-free |delivery |of |data |to |the |receiving |device |or |node. |This |layer |is |implemented |
through |the |use |of |devices |such |as |switches |and |bridge |devices, |as |well |as |anything |with |a |
network |interface, |like |wireless |or |wired |network |cards.



OSI |Layer |3 |- |Network |- |CORRECT |ANSWER✔✔-Network |Layer: |This |layer |is |responsible |for |the
|transmission |of |data |between |hosts |in |different |networks |as |well |as |routing |of |data |packets. |


This |layer |is |implemented |through |the |use |of |devices |such |as |routers |and |some |switches.



OSI |Layer |4 |- |Transport |- |CORRECT |ANSWER✔✔-Transport |Layer: |This |layer |provides |services |
to |the |application |layer |and |receives |services |from |the |network |layer. |It |is |responsible |for |the |
reliable |delivery |of |data. |It |segments |and |reassembles |data |in |the |correct |order |for |it |to |be |
sent |to |the |receiving |device. |It |may |also |handle |the |reliable |delivery |of |data |and |any |retries |of
|data |that |are |lost |or |corrupted |(for |example, |TCP |does |this). |This |layer |is |often |called |the |


heart |of |OSI.



OSI |Layer |5 |- |Session |- |CORRECT |ANSWER✔✔-Session |Layer: |This |layer |is |responsible |for |
connection |establishment, |session |maintenance, |and |authentication.



OSI |Layer |6 |- |Presentation |- |CORRECT |ANSWER✔✔-Presentation |Layer: |This |layer |is |
responsible |for |translating |data |from |the |application |layer |into |the |format |required |to |transmit
|the |data |over |the |network |as |well |as |encrypting |the |data |for |security |if |encryption |is |used.

, OSI |Layer |7 |- |Application |- |CORRECT |ANSWER✔✔-Application |Layer: |This |layer |is |responsible |
for |network |applications |(like |HTTP |or |FTP) |and |their |production |of |data |to |be |transferred |over
|the |network.




Which |transmission |control |protocol/internet |protocol |(TCP/IP) |layer |performs |addressing |and |
routing? |- |CORRECT |ANSWER✔✔-Network |layer |handles |addressing |and |routing |to |different |
networks.



Which |layer |of |the |OSI |model |does |a |bridge |use |to |make |decisions |about |forwarding |data |
packets? |- |CORRECT |ANSWER✔✔-The |Data |Link |layer |(Layer |2) |represents |network |
communication |at |a |MAC-address |level |and |forwards |packets |on |Layer |2 |devices, |like |a |bridge.



Which |layer |of |the |OSI |model |establishes, |manages, |and |terminates |connections? |- |CORRECT |
ANSWER✔✔-The |Session |layer |establishes, |manages, |and |terminates |connections.



What |layer |of |the |OSI |Model |does |SSL/TLS |operate |at? |- |CORRECT |ANSWER✔✔-Layer |6 |- |
Presentation



What |layer |of |the |OSI |Model |does |IPsec |operate |at? |- |CORRECT |ANSWER✔✔-Layer |3 |- |
Network



Which |encryption |application |provides |authentication |and |encryption |services |that |are |
commonly |used |to |create |VPN |tunnels |at |OSI |Layer |3? |- |CORRECT |ANSWER✔✔-Internet |
protocol |security |(IPSec)



What |is |a |characteristic |of |symmetric |key |encryption? |- |CORRECT |ANSWER✔✔-Use |of |a |
shared |key



What |is |the |result |of |the |encryption |process? |- |CORRECT |ANSWER✔✔-Ciphertext