CCNA QUESTIONS | COMPLETE PRACTICE QUESTIONS, ANSWERS & STUDY
GUIDE 2026/2027
What is a characteristic of the LLC sublayer? - ANS ✔✔It places information in the frame allowing
multiple Layer 3 protocols to use the same network interface and media
What are the three primary functions provided by Layer 2 data encapsulation? - ANS ✔✔data link layer
addressing, detection of errors through CRC calculations, delimiting groups of bits into frames
What addresses are mapped by ARP? - ANS ✔✔Destination MAC address to a destination IPv4 address
What are two services provided by the OSI network layer - ANS ✔✔routing packets toward the
destination, encapsulating PDUs from the transport layer
What is the dotted decimal representation of the IPv4 address
11001011.00000000.01110001.11010011? - ANS ✔✔203.0.113.211
What are three characteristics of multicast transmission? - ANS ✔✔A single packet can be sent to a
group of hosts, multicast transmission can be used by routers to exchange routing information, routers
will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255
What are three ranges of IP addresses that are reserved for internal private use? - ANS ✔✔10.0.0.0/8,
172.16.0.0/12, 192.168.0.0/16
A user opens three browsers on the same PC to access www.cisco.com to search for certification course
information. The Cisco web server sends a datagram as a reply to the request from one of the web
browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three
web browsers should receive the reply? - ANS ✔✔The destination port number
Which two tasks are functions of the presentation layer? - ANS ✔✔compression, encryption
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the
network? - ANS ✔✔Segments are sent from the transport layer to the internet layer
Under which two circumstances will a switch flood a frame out of every port except the port that the
frame was received on? - ANS ✔✔The frame has the broadcast address as the destination address, the
destination address is unknown to the switch
Which two commands can be used on a Windows host to display the routing table? - ANS ✔✔route
print, netstat -r
Which two functions are primary functions of a router? - ANS ✔✔Packet forwarding, path selection
What is the binary representation of 0xCA? - ANS ✔✔110001010
How many usable IP addresses are available on the 192.168.1.0/27 network? - ANS ✔✔30
GUIDE 2026/2027
What is a characteristic of the LLC sublayer? - ANS ✔✔It places information in the frame allowing
multiple Layer 3 protocols to use the same network interface and media
What are the three primary functions provided by Layer 2 data encapsulation? - ANS ✔✔data link layer
addressing, detection of errors through CRC calculations, delimiting groups of bits into frames
What addresses are mapped by ARP? - ANS ✔✔Destination MAC address to a destination IPv4 address
What are two services provided by the OSI network layer - ANS ✔✔routing packets toward the
destination, encapsulating PDUs from the transport layer
What is the dotted decimal representation of the IPv4 address
11001011.00000000.01110001.11010011? - ANS ✔✔203.0.113.211
What are three characteristics of multicast transmission? - ANS ✔✔A single packet can be sent to a
group of hosts, multicast transmission can be used by routers to exchange routing information, routers
will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255
What are three ranges of IP addresses that are reserved for internal private use? - ANS ✔✔10.0.0.0/8,
172.16.0.0/12, 192.168.0.0/16
A user opens three browsers on the same PC to access www.cisco.com to search for certification course
information. The Cisco web server sends a datagram as a reply to the request from one of the web
browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three
web browsers should receive the reply? - ANS ✔✔The destination port number
Which two tasks are functions of the presentation layer? - ANS ✔✔compression, encryption
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the
network? - ANS ✔✔Segments are sent from the transport layer to the internet layer
Under which two circumstances will a switch flood a frame out of every port except the port that the
frame was received on? - ANS ✔✔The frame has the broadcast address as the destination address, the
destination address is unknown to the switch
Which two commands can be used on a Windows host to display the routing table? - ANS ✔✔route
print, netstat -r
Which two functions are primary functions of a router? - ANS ✔✔Packet forwarding, path selection
What is the binary representation of 0xCA? - ANS ✔✔110001010
How many usable IP addresses are available on the 192.168.1.0/27 network? - ANS ✔✔30
