CNE FINAL EXAM 2024 ACTUAL EXAM COMPLETE
ACCURATE EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+
What 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, goal is to reduce
data loss, system of checks when connecting to ensure reliability (encryption too for
HTTPS)
Persistent vs non-persistent HTTPS - ANSWER Persistent: maintains connection, non-
persistent drops connection with host once sent
DNS Hierarchy - ANSWER Root: Stores where TLDs are, and redirects
Top-Level Domains: manages domain names registered under .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
receiving emails on behalf of a domain
(basically DNS version of mail)
DASH - ANSWER Dynamic Adaptive Streaming over HTTP: Adjust quality of video
based on user's network conditions. Cuts big media into segments.
TCP vs UDP - ANSWER TCP uses handshakes to ensure reliable connection, Uses
acknowledgments, SYN ACK, etc.
UDP does not, just sends without ensuring anything
Applications of UDP - ANSWER Video Streaming, Video Games, VoIP
Applications of TCP - ANSWER Web browsers, articles, anything that needs accurate
info, emails,etc
Reliable Data Transfer (RDT) - ANSWER Reliable Data Transfer (RDT) is a set of
protocols and mechanisms used to ensure that data transmitted over a network reaches
its destination accurately and in the correct order, despite potential errors or losses
during transmission.
rdt 1.0 - ANSWER assumes reliable data channel
rdt 2.0 - ANSWER checksums (error detection), ACKs/NAKs (handle data loss)
rdt 2.1 - ANSWER sequence numbers (prevent duplicates)
rdt 2.2 - ANSWER NAK free (has seq #)
rdt 3.0 - ANSWER includes countdown timer to detect packet loss (stop and wait)
ACCURATE EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+
What 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, goal is to reduce
data loss, system of checks when connecting to ensure reliability (encryption too for
HTTPS)
Persistent vs non-persistent HTTPS - ANSWER Persistent: maintains connection, non-
persistent drops connection with host once sent
DNS Hierarchy - ANSWER Root: Stores where TLDs are, and redirects
Top-Level Domains: manages domain names registered under .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
receiving emails on behalf of a domain
(basically DNS version of mail)
DASH - ANSWER Dynamic Adaptive Streaming over HTTP: Adjust quality of video
based on user's network conditions. Cuts big media into segments.
TCP vs UDP - ANSWER TCP uses handshakes to ensure reliable connection, Uses
acknowledgments, SYN ACK, etc.
UDP does not, just sends without ensuring anything
Applications of UDP - ANSWER Video Streaming, Video Games, VoIP
Applications of TCP - ANSWER Web browsers, articles, anything that needs accurate
info, emails,etc
Reliable Data Transfer (RDT) - ANSWER Reliable Data Transfer (RDT) is a set of
protocols and mechanisms used to ensure that data transmitted over a network reaches
its destination accurately and in the correct order, despite potential errors or losses
during transmission.
rdt 1.0 - ANSWER assumes reliable data channel
rdt 2.0 - ANSWER checksums (error detection), ACKs/NAKs (handle data loss)
rdt 2.1 - ANSWER sequence numbers (prevent duplicates)
rdt 2.2 - ANSWER NAK free (has seq #)
rdt 3.0 - ANSWER includes countdown timer to detect packet loss (stop and wait)
