Cisco CCNA CERTIFICATION PAPER 2026
FULL SOLUTION GRADED A+
● A network administrator enters the service password-encryption
command into the configuration mode of a router. What does this
command accomplish? Answer: This command prevents someone from
viewing the running configuration passwords.
● What is the usable number of host IP addresses on a network that has
a /26 mask? Answer: 62
● What three blocks of addresses are defined by RFC 1918 for private
network use? (Choose three.) Answer: 192.168.0.0/16
172.16.0.0/12
10.0.0.0/8
● Refer to the exhibit. An administrator must send a message to
everyone on the router A network. What is the broadcast address for
network 172.16.16.0/22? Answer: 172.16.19.255
● For Cisco IOS, which escape sequence allows terminating a
traceroute operation? Answer: Ctrl+c
, ● What type of communication rule would best describe CSMA/CD?
Answer: access method
● What is the objective of a network reconnaissance attack? Answer:
discovery and mapping of systems
● Which term refers to a network that provides secure access to the
corporate offices by suppliers, customers and collaborators? Answer:
extranet
● What will a Layer 2 switch do when the destination MAC address of
a received frame is not in the MAC table? Answer: It forwards the frame
out of all ports except for the port at which the frame was received.
● What type of communication medium is used with a wireless LAN
connection? Answer: radio waves
● What are two features of ARP? (Choose two.) Answer: 1. If a host is
ready to send a packet to a local destination device and it has the IP
address but not the MAC address of the destination, it generates an ARP
broadcast.
2. If a device receiving an ARP request has the destination IPv4 address,
it responds with an ARP reply.
FULL SOLUTION GRADED A+
● A network administrator enters the service password-encryption
command into the configuration mode of a router. What does this
command accomplish? Answer: This command prevents someone from
viewing the running configuration passwords.
● What is the usable number of host IP addresses on a network that has
a /26 mask? Answer: 62
● What three blocks of addresses are defined by RFC 1918 for private
network use? (Choose three.) Answer: 192.168.0.0/16
172.16.0.0/12
10.0.0.0/8
● Refer to the exhibit. An administrator must send a message to
everyone on the router A network. What is the broadcast address for
network 172.16.16.0/22? Answer: 172.16.19.255
● For Cisco IOS, which escape sequence allows terminating a
traceroute operation? Answer: Ctrl+c
, ● What type of communication rule would best describe CSMA/CD?
Answer: access method
● What is the objective of a network reconnaissance attack? Answer:
discovery and mapping of systems
● Which term refers to a network that provides secure access to the
corporate offices by suppliers, customers and collaborators? Answer:
extranet
● What will a Layer 2 switch do when the destination MAC address of
a received frame is not in the MAC table? Answer: It forwards the frame
out of all ports except for the port at which the frame was received.
● What type of communication medium is used with a wireless LAN
connection? Answer: radio waves
● What are two features of ARP? (Choose two.) Answer: 1. If a host is
ready to send a packet to a local destination device and it has the IP
address but not the MAC address of the destination, it generates an ARP
broadcast.
2. If a device receiving an ARP request has the destination IPv4 address,
it responds with an ARP reply.
