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CNE Final Exam Prep Questions And Answers
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CNE Final Exam Prep Questions And Answers 2024-2025What is FDM and TDM - ANSWER Divides information based on frequency, divides
information based on time
Guided vs Unguided Media - ANSWER Guided: data transfer through physical media,
wired, connected physically
Unguided: transmission through air, space, etc.
Four Sources of Packet Delay - ANSWER Processing, Queuing, Transmission,
Propagation
3 asterisks in traceroute - ANSWER no response was received from the hop within the
timeout period.
layers of internet protocol stack - ANSWER Application
Transport
Network
Link
Physical
Application- ANSWER Provides network services
HTTP(S), QUIK, DHCP, SNMP
Transport- ANSWER provides transfer of data between hosts
UDP, TCP
, Network- ANSWER Forwarding and Routing
Link- ANSWER Organize data into frames, detects/corrects errors in Physical layer
Ethernet, WIFI, MAC (Media Access Control), PPP(Point to point protocol)
Physical- ANSWER transmits and receives between physical medium
Cables, fiber optics
elastic throughput - ANSWER dynamically adjusting network bandwidth to optimize
performance and accommodate varying traffic demands efficiently.
What is TLS? How does it work? - ANSWER Transport Layer Security, objective is to
reduce data loss, system of checks when connecting to make sure it is reliable, also
encryption for HTTPS
Persistent vs non-persistent HTTPS - ANSWER Persistent: keeps connection open,
Non-persistent: closes the connection with the host once the information has been
delivered
DNS Hierarchy - ANSWER Root: Keeps record of where TLDs are located, and redirects
Top Level Domains: Keeps records of domain name registrations under the .com .org,
etc.
Authoritative Servers: Where the actual domains (websites and IPs) are stored
Iterated vs recursive DNS query - ANSWER Recursive: DNS goes through servers
independently
Iterated: client asks multiple DNSs until one has what it needs
MX record - ANSWER Mail Exchange record specifies the main server responsible for
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