CCNA Practice Exam Questions With
100% Correct And Verified Answers 2025
True statements about the operation of a full-duplex Ethernet network - Correct Answer-
There are no collisions in full-duplex mode.
A dedicated switch port is required for each full-duplex node.
The host network card and the switch port must be capable of operating in full-duplex
mode.
Which OSI layer header contains the address of a destination host that is on another
network? - Correct Answer-Network Layer
Which layer of the TCP/IP stack combines the OSI model physical and data link layers?
- Correct Answer-Network access layer
Which protocol uses a connection-oriented service to deliver files between end
systems? - Correct Answer-FTP
What do switches do? - Correct Answer-Prevent Ethernet Collisions, Create less
collision domains.
Mac Address - Correct Answer-Physical Address, Layer 2 devices,
Which network device functions only at Layer 1 of the OSI model? - Correct Answer-
Hub
Which transport layer protocol provides best-effort delivery service with no
acknowledgment receipt required? - Correct Answer-UDP
Which layer of the OSI model controls the reliability of communications between
network devices using flow control, sequencing and acknowledgments? - Correct
Answer-Transport Layer
True statements regarding ICMP packets - Correct Answer-TRACERT uses ICMP
packets.
They are encapsulated within IP datagrams
Statements that accurately describe CDP - Correct Answer-CDP is a Cisco proprietary
protocol.
CDP is a datalink layer protocol.
CDP can discover directly connected neighboring Cisco devices.
How does a switch differ from a hub? - Correct Answer-A switch tracks MAC addresses
of directly-connected devices.
