CCNA 2 – SWITCHING, ROUTING, AND WIRELESS ESSENTIALS | COMPLETE
PRACTICE QUESTIONS, ANSWERS & STUDY GUIDE 2026/2027
Refer to the exhibit. What will router R1 do with a packet that has a destination IPv6 address of
2001:db8:cafe:5::1? - ANS ✔✔Forward the packet out Serial 0/0/0
Refer to the exhibit. Currently router R1 uses an EIGRP route learned from Branch2 to reach the
10.20.0.0/16 network. Which floating static route would create a backup route to the 10.10.0.0/16
network in the event that the link between R1 and Branch2 goes down? - ANS ✔✔IP route 10.10.00
255.255.0.0 209.165.200.225 100
Refer to the exhibit. R1 was configured with the static route command ip route 209.165.200.224
255.255.255.224 S0/0/0 and consequently users on network 172.16.0.0/16 are unable to reach
resources on the Internet. How should this static route be changed to allow user traffic from the LAN to
reach the Internet? - ANS ✔✔Change the destination network and mask to 0.0.0.0 0.0.0.0
Which option shows a correctly configured IPv4 default static route? - ANS ✔✔ip route 0.0.0.0 0.0.0.0
S0/0/0
Refer to the exhibit. Which static route command can be entered on R1 to forward traffic to the LAN
connected to R2? - ANS ✔✔ipv6 route 2001:db8:12:10::/64 S0/0/1 fe80::2
What is a method to launch a VLAN hopping attack? - ANS ✔✔introducing a rogue switch and enabling
trunking
A cyber security analyst is using the Mac of tool to evaluate configurations of switches deployed in the
backbone network of an organization. Which type of LAN attack is the analyst targeting during this
evaluation? - ANS ✔✔MAC address table overflow
Which three components are combined to form a bridge ID? - ANS ✔✔Extended system ID, Bridge
priority, MAC address
While attending a conference, participants are using laptops for network connectivity. When a guest
speaker attempts to connect to the network, the laptop fails to display any available wireless networks.
The access point must be operating in which mode? - ANS ✔✔Active
A PC has sent an RS message to an IPv6 router attached to the same network. Which two pieces of
information will the router send to the client? (Choose two.) - ANS ✔✔Prefix length, prefix
Which mitigation technique would prevent rogue servers from providing false IP configuration
parameters to clients? - ANS ✔✔Enabling DHCPv6 Guard
A technician is configuring a wireless network for a small business using a SOHO wireless router. Which
two authentication methods are used, if the router is configured with WPA2? (Choose two.) - ANS
✔✔Personal, enterprise
, What else is required when configuring an IPv6 static route using a next-hop link-local address? - ANS
✔✔Interface number and type
What defines a host route on a Cisco router? - ANS ✔✔An IPv4 static host route configuration uses a
destination IP address of a specific device and a /32 subnet mask.
A small publishing company has a network design such that when a broadcast is sent on the LAN, 200
devices receive the transmitted broadcast. How can the network administrator reduce the number of
devices that receive broadcast traffic? - ANS ✔✔Segment the LAN into smaller LANs and route between
them.
What action takes place when the source MAC address of a frame entering a switch is in the MAC
address table? - ANS ✔✔The switch updates the refresh timer for the entry.
What is the effect of entering the show in dhcp snooping binding configuration command on a switch? -
ANS ✔✔It displays the IP-to-MAC address associations for switch interfaces.
What protocol or technology uses a standby router to assume packet-forwarding responsibility if the
active router fails? - ANS ✔✔HSRP
What is an advantage of PVST+? - ANS ✔✔PVST+ optimizes performance on the network through load
sharing.
Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks? - ANS ✔✔Dynamic ARP
Inspection
Which term describes the role of a Cisco switch in the 802.1X port-based access control? - ANS
✔✔authenticator
What are two characteristics of Cisco Express Forwarding (CEF)? (Choose two) - ANS ✔✔1. This is the
fastest forwarding mechanism on Cisco routers and multilayer switches.
2. Packets are forwarded based on information in the FIB and an adjacency table.
What address and prefix length is used when configuring an IPv6 default static route? - ANS ✔✔::/0
What protocol or technology is a Cisco proprietary protocol that is automatically enabled on 2960
switches? - ANS ✔✔DTP
What is the effect of entering the pi arp inspection validate sec-mac configuration command on a
switch? - ANS ✔✔It checks the source L2 address in the Ethernet header against the sender L2 address
in the ARP body.
A network administrator is configuring a WLAN. Why would the administrator change the default DHCP
IPv4 addresses on an AP? - ANS ✔✔To reduce outsiders intercepting data or accessing the wireless
network by using a well-known address range.
What is the effect of entering the ip dhcp snooping limit rate 6 configuration command on a switch? -
ANS ✔✔It restricts the number of discovery messages, per second, to be received on the interface.
PRACTICE QUESTIONS, ANSWERS & STUDY GUIDE 2026/2027
Refer to the exhibit. What will router R1 do with a packet that has a destination IPv6 address of
2001:db8:cafe:5::1? - ANS ✔✔Forward the packet out Serial 0/0/0
Refer to the exhibit. Currently router R1 uses an EIGRP route learned from Branch2 to reach the
10.20.0.0/16 network. Which floating static route would create a backup route to the 10.10.0.0/16
network in the event that the link between R1 and Branch2 goes down? - ANS ✔✔IP route 10.10.00
255.255.0.0 209.165.200.225 100
Refer to the exhibit. R1 was configured with the static route command ip route 209.165.200.224
255.255.255.224 S0/0/0 and consequently users on network 172.16.0.0/16 are unable to reach
resources on the Internet. How should this static route be changed to allow user traffic from the LAN to
reach the Internet? - ANS ✔✔Change the destination network and mask to 0.0.0.0 0.0.0.0
Which option shows a correctly configured IPv4 default static route? - ANS ✔✔ip route 0.0.0.0 0.0.0.0
S0/0/0
Refer to the exhibit. Which static route command can be entered on R1 to forward traffic to the LAN
connected to R2? - ANS ✔✔ipv6 route 2001:db8:12:10::/64 S0/0/1 fe80::2
What is a method to launch a VLAN hopping attack? - ANS ✔✔introducing a rogue switch and enabling
trunking
A cyber security analyst is using the Mac of tool to evaluate configurations of switches deployed in the
backbone network of an organization. Which type of LAN attack is the analyst targeting during this
evaluation? - ANS ✔✔MAC address table overflow
Which three components are combined to form a bridge ID? - ANS ✔✔Extended system ID, Bridge
priority, MAC address
While attending a conference, participants are using laptops for network connectivity. When a guest
speaker attempts to connect to the network, the laptop fails to display any available wireless networks.
The access point must be operating in which mode? - ANS ✔✔Active
A PC has sent an RS message to an IPv6 router attached to the same network. Which two pieces of
information will the router send to the client? (Choose two.) - ANS ✔✔Prefix length, prefix
Which mitigation technique would prevent rogue servers from providing false IP configuration
parameters to clients? - ANS ✔✔Enabling DHCPv6 Guard
A technician is configuring a wireless network for a small business using a SOHO wireless router. Which
two authentication methods are used, if the router is configured with WPA2? (Choose two.) - ANS
✔✔Personal, enterprise
, What else is required when configuring an IPv6 static route using a next-hop link-local address? - ANS
✔✔Interface number and type
What defines a host route on a Cisco router? - ANS ✔✔An IPv4 static host route configuration uses a
destination IP address of a specific device and a /32 subnet mask.
A small publishing company has a network design such that when a broadcast is sent on the LAN, 200
devices receive the transmitted broadcast. How can the network administrator reduce the number of
devices that receive broadcast traffic? - ANS ✔✔Segment the LAN into smaller LANs and route between
them.
What action takes place when the source MAC address of a frame entering a switch is in the MAC
address table? - ANS ✔✔The switch updates the refresh timer for the entry.
What is the effect of entering the show in dhcp snooping binding configuration command on a switch? -
ANS ✔✔It displays the IP-to-MAC address associations for switch interfaces.
What protocol or technology uses a standby router to assume packet-forwarding responsibility if the
active router fails? - ANS ✔✔HSRP
What is an advantage of PVST+? - ANS ✔✔PVST+ optimizes performance on the network through load
sharing.
Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks? - ANS ✔✔Dynamic ARP
Inspection
Which term describes the role of a Cisco switch in the 802.1X port-based access control? - ANS
✔✔authenticator
What are two characteristics of Cisco Express Forwarding (CEF)? (Choose two) - ANS ✔✔1. This is the
fastest forwarding mechanism on Cisco routers and multilayer switches.
2. Packets are forwarded based on information in the FIB and an adjacency table.
What address and prefix length is used when configuring an IPv6 default static route? - ANS ✔✔::/0
What protocol or technology is a Cisco proprietary protocol that is automatically enabled on 2960
switches? - ANS ✔✔DTP
What is the effect of entering the pi arp inspection validate sec-mac configuration command on a
switch? - ANS ✔✔It checks the source L2 address in the Ethernet header against the sender L2 address
in the ARP body.
A network administrator is configuring a WLAN. Why would the administrator change the default DHCP
IPv4 addresses on an AP? - ANS ✔✔To reduce outsiders intercepting data or accessing the wireless
network by using a well-known address range.
What is the effect of entering the ip dhcp snooping limit rate 6 configuration command on a switch? -
ANS ✔✔It restricts the number of discovery messages, per second, to be received on the interface.
