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25/02/2026
Remove Specific Static Routes
If your routes are:
ip route 192.168.12.0 255.255.255.0 192.168.10.2
ip route 192.168.11.0 255.255.255.252 192.168.10.2
Enter global configuration mode and remove them:
Router # conf t
Router(config) # no ip route 192.168.12.0 255.255.255.0 192.168.10.2
Router(config) # no ip route 192.168.11.0 255.255.255.252 192.168.10.2
Router(config) # no ip route 0.0.0.0 0.0.0.0 192.168.10.2
Router(config) # end
Router # write memory
09/02/2026
What is Port Security in Cisco?
Port Security is a Layer 2 security feature on Cisco switches that limits which devices (MAC addresses) can connect to a switch port.
👉 Goal: Prevent unauthorized devices from accessing the
network.
Typical use case:
• User access ports (PCs, printers, IP phones)
• Prevent rogue laptops or switches
________________________________________
Key Rules of Port Security
• Works only on access ports
• Uses MAC addresses to identify devices
• Can restrict, drop, or shut down the port if violated
22/01/2026
syslog severity levels define the importance of system messages, from critical system failures to debugging details, helping administrators prioritize monitoring and troubleshooting.
20/01/2026
Which WAN topology has the highest degree of reliability?
A. point-to-point
B. router-on-a-stick
C. full mesh
D. hub-and-spoke
18/01/2026
Refer to the exhibit. Configurations for the switch and PCs are complete. Which configuration must be applied so that VLANs 2 and 3 communicate back and forth?
A. interface GigabitEthernet0/0 ip address 10.10.2.10 255.255.252.0
B. interface GigabitEthernet0/.10 encapsulation dot1Q 3 ip address 10.10.2.10 255.255.254.0
C. interface GigabitEthernet0/.3 encapsulation dot1Q 3 native ip address 10.10.2.10 255.255.252.0
D. interface GigabitEthernet0/.3 encapsulation dot1Q 10 ip address 10.10.2.10 255.255.252
17/01/2026
Which protocol uses the SSL?
• A. SSH
• B. HTTPS
• C. HTTP
• D. Telnet
16/01/2026
Refer to the exhibit. The given Windows PC is requesting the IP address of the host at .www..cisco..com. To which IP address is the request sent?
A. 192.168.1.253
B. 192.168.1.100
C. 192.168.1.226
D. 192.168.1.254
15/01/2026
Refer to the exhibit. Each router must be configured with the last usable IP address in the subnet. Which configuration fulfills this requirement?
A.
R7 # interface FastEthernet1/0 ip address 10.88.31.127 255.255.255.192
R8 # interface FastEthernet0/0 ip address 10.19.63.95 255.255.255.240
R9 # interface FastEthernet1/1 ip address 10.23.98.159 255.255.255.224
B.
R7 # interface FastEthernet1/0 ip address 10.88.31.126 255.255.255.240
R8 # interface FastEthernet0/0 ip address 10.19.63.94 255.255.255.192
R9 # interface FastEthernet1/1 ip address 10.23.98.158 255.255.255.248
C.
R7 # interface FastEthernet1/0 ip address 10.88.31.127 255.255.255.240
R8 # interface FastEthernet0/0 ip address 10.19.63.95 255.255.255.192
R9 # interface FastEthernet1/1 ip address 10.23.98.159 255.255.255.248
D.
R7 # interface FastEthernet1/0 ip address 10.88.31.126 255.255.255.192
R8 # interface FastEthernet0/0 ip address 10.19.63.94 255.255.255.240
R9 # interface FastEthernet1/1 ip address 10.23.98.158 255.255.255.224
15/01/2026
Refer to the exhibit. R1 has just received a packet from host A that is destined to host B. Which route in the routing table is used by R1 to reach host B?
A. 10.10.13.0/25 1/0via 10.10.10.2
B. 10.10.13.0/25 108/0via 10.10.10.10
C. 10.10.13.0/25 110/2via 10.10.10.6
D. 10.10.13.0/25 110/2via 10.10.10.2
14/01/2026
Refer to the exhibit. When PC-A sends traffic to PC-B, which network component is in charge of receiving the packet from PC-A, verifying the IP addresses, and forwarding the packet to PC-B?
A Router
B Layer 2 switch
C Load balancer
D Firewall
13/01/2026
Refer to the exhibit. When PC1 sends a packet to PC2, the packet has which source and destination IP address when it arrives at interface Gi0/0 on router R2?
Options:
A. Source 192.168.10.10 and destination 10.10.2.2
B. Source 192.168.20.10 and destination 192.168.20.1
C. Source 192.168.10.10 and destination 192.168.20.10
D. Source 10.10.1.1 and destination 10.10.2.2