CCNA PRACTICE EXAM | COMPLETE PRACTICE QUESTIONS, ANSWERS
& STUDY GUIDE 2026/2027
Which term refers to a network that provides secure access to the corporate office by suppliers,
customers, and collaborators? - correct answer ✔✔Extranet
A small business user is looking for an ISP connection that provides high speed digital transmission over
regular phone lines. What ISP connection type should be used? - correct answer ✔✔DSL
An administrator is trying to configure the switch but receives the error message that is displayed in the
exhibit. What is the problem?
Switch> config t
Error - correct answer ✔✔The administrator must first enter the privileged EXEC mode before issuing
the command.
Which keys act as a hot key combination that is used to interrupt IOS process? - correct answer ✔✔Ctrl-
Shift-6
A network administrator is configuring access control to switch SW1. If the administrator uses Telnet to
connect to the switch, which password is needed to access user EXEC mode?
SW1(config)# enable password letmein
SW1(config)# enable secret secretin
SW1(config)# line con 0
SW1(config-line)# password lineconin
SW1(config-line)# login
SW1(config-line)# exit
SW1(config)# line vty 0 15
SW1(config-line)# password linevtyin
SW1(config-line)# login
SW1(config-line)# end
SW1# - correct answer ✔✔linevtyin
A network administrator enters the service password-encryption command into the configuration mode
of a router. What does that command accomplish? - correct answer ✔✔This command prevents
someone from viewing the running configuration passwords.
What is the purpose of the SVI on a Cisco switch? - correct answer ✔✔The SVI provides a virtual
interface for remote access to the switch.
Which message delivery option is used when all devices need to receive the same message
simultaneously? - correct answer ✔✔Broadcast
Which two protocols function at the internet layer? (Choose Two) - correct answer ✔✔ICMP and IP
, What PDU is associated with the transport layer? - correct answer ✔✔Segment
What is done to an IP packet before it is transmitted over the physical medium? - correct answer ✔✔It is
encapsulated in a Layer 2 frame.
What type of communication medium is used with a wireless LAN connection? - correct answer
✔✔Radio Waves
In addition to the cable length, what two factors could interfere with the communication carried over
UTP cables? (Choose Two) - correct answer ✔✔Crosstalk and Electromagnetic Interference
What are the two sublayers of the OSI model data link layer? (Choose Two) - correct answer ✔✔LLC and
MAC
A technician has been asked to develop a physical topology for a network provides a high level of
redundancy. Which physical topology requires that every node is attached to every other node on the
network? - correct answer ✔✔Mesh
What type of communication rule would best describe CSMA/CD? - correct answer ✔✔Access Method
If data is being sent over a wireless network, then connects to an Ethernet network, and eventually
connects to a DSL connection, which header will be replaced each time the data travels through a
network infrastructure device? - correct answer ✔✔Data Link
What best described the destination IPv4 address that is used by multicasting? - correct answer ✔✔A
single IP multicast address that is used by all destinations in a group.
In an Ethernet network, when a device receives a frame of 1200 bytes, what will it do? - correct answer
✔✔Process the frame as it is.
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC
table? - correct answer ✔✔It forwards the frame out of all ports except for the port at which the frame
was received.
What are two features of ARP? (Choose Two) - correct answer ✔✔If a host is ready to send a packet to a
local destination device are it has the IP address but not the MAC address of the destination, it generates
an ARP broadcast.
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
Which two services are required to enable a computer to receive dynamic IP address and access the
Internet using domain names? (Choose Two) - correct answer ✔✔DNS
DHCP
What is a basic characteristic of the IP protocol? - correct answer ✔✔Connectionless
A user issues the command netstat -r on a workstation. Which IPv6 address is on of the link-local
addresses of the workstation?
& STUDY GUIDE 2026/2027
Which term refers to a network that provides secure access to the corporate office by suppliers,
customers, and collaborators? - correct answer ✔✔Extranet
A small business user is looking for an ISP connection that provides high speed digital transmission over
regular phone lines. What ISP connection type should be used? - correct answer ✔✔DSL
An administrator is trying to configure the switch but receives the error message that is displayed in the
exhibit. What is the problem?
Switch> config t
Error - correct answer ✔✔The administrator must first enter the privileged EXEC mode before issuing
the command.
Which keys act as a hot key combination that is used to interrupt IOS process? - correct answer ✔✔Ctrl-
Shift-6
A network administrator is configuring access control to switch SW1. If the administrator uses Telnet to
connect to the switch, which password is needed to access user EXEC mode?
SW1(config)# enable password letmein
SW1(config)# enable secret secretin
SW1(config)# line con 0
SW1(config-line)# password lineconin
SW1(config-line)# login
SW1(config-line)# exit
SW1(config)# line vty 0 15
SW1(config-line)# password linevtyin
SW1(config-line)# login
SW1(config-line)# end
SW1# - correct answer ✔✔linevtyin
A network administrator enters the service password-encryption command into the configuration mode
of a router. What does that command accomplish? - correct answer ✔✔This command prevents
someone from viewing the running configuration passwords.
What is the purpose of the SVI on a Cisco switch? - correct answer ✔✔The SVI provides a virtual
interface for remote access to the switch.
Which message delivery option is used when all devices need to receive the same message
simultaneously? - correct answer ✔✔Broadcast
Which two protocols function at the internet layer? (Choose Two) - correct answer ✔✔ICMP and IP
, What PDU is associated with the transport layer? - correct answer ✔✔Segment
What is done to an IP packet before it is transmitted over the physical medium? - correct answer ✔✔It is
encapsulated in a Layer 2 frame.
What type of communication medium is used with a wireless LAN connection? - correct answer
✔✔Radio Waves
In addition to the cable length, what two factors could interfere with the communication carried over
UTP cables? (Choose Two) - correct answer ✔✔Crosstalk and Electromagnetic Interference
What are the two sublayers of the OSI model data link layer? (Choose Two) - correct answer ✔✔LLC and
MAC
A technician has been asked to develop a physical topology for a network provides a high level of
redundancy. Which physical topology requires that every node is attached to every other node on the
network? - correct answer ✔✔Mesh
What type of communication rule would best describe CSMA/CD? - correct answer ✔✔Access Method
If data is being sent over a wireless network, then connects to an Ethernet network, and eventually
connects to a DSL connection, which header will be replaced each time the data travels through a
network infrastructure device? - correct answer ✔✔Data Link
What best described the destination IPv4 address that is used by multicasting? - correct answer ✔✔A
single IP multicast address that is used by all destinations in a group.
In an Ethernet network, when a device receives a frame of 1200 bytes, what will it do? - correct answer
✔✔Process the frame as it is.
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC
table? - correct answer ✔✔It forwards the frame out of all ports except for the port at which the frame
was received.
What are two features of ARP? (Choose Two) - correct answer ✔✔If a host is ready to send a packet to a
local destination device are it has the IP address but not the MAC address of the destination, it generates
an ARP broadcast.
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
Which two services are required to enable a computer to receive dynamic IP address and access the
Internet using domain names? (Choose Two) - correct answer ✔✔DNS
DHCP
What is a basic characteristic of the IP protocol? - correct answer ✔✔Connectionless
A user issues the command netstat -r on a workstation. Which IPv6 address is on of the link-local
addresses of the workstation?
