Final 9
Network Security and Troubleshooting Quiz
Test your knowledge of network security, access control lists (ACLs), and troubleshooting techniques with this challenging quiz! Designed for network professionals, this quiz covers a wide range of topics and scenarios to assess your skills and understanding.
- 10 multiple-choice questions
- Focus on ACLs, NAT, QoS, and OSPF
- Great for self-assessment and knowledge reinforcement
An ACL is applied inbound on a router interface. The ACL consists of a single entry: access-list 101 permit tcp 10.1.1.0 0.0.0.255 host 10.1.3.8 eq dns . If a packet with a source address of 10.1.3.8, a destination address of 10.10.3.8, and a protocol of 53 is received on the interface, is the packet permitted or denied?
Denied
Permitted
Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?
Defines which addresses are allowed into the router
Defines which addresses can be translated
Defines which addresses are assigned to a NAT pool
Defines which addresses are allowed out of the router
If a router has two interfaces and is routing both IPv4 and IPv6 traffic, how many ACLs could be created and applied to it?
12
4
8
16
6
Refer to the exhibit. An administrator first configured an extended ACL as shown by the output of the show access-lists command. The administrator then edited this access-list by issuing the commands below.
TFTP packets will be permitted.
Ping packets will be permitted.
Telnet packets will be permitted.
SSH packets will be permitted.
All TCP and UDP packets will be denied
Which troubleshooting approach is more appropriate for a seasoned network administrator rather than a less-experienced network administrator?
A less-structured approach based on an educated guess
An approach comparing working and nonworking components to spot significant differences
A structured approach starting with the physical layer and moving up through the layers of the OSI model until the cause of the problem is identified
An approach that starts with the end-user applications and moves down through the layers of the OSI model until the cause of the problem has been identified
Refer to the exhibit. Many employees are wasting company time accessing social media on their work computers. The company wants to stop this access. What is the best ACL type and placement to use in this situation?
Extended ACL outbound on R2 WAN interface towards the internet
Standard ACL outbound on R2 WAN interface towards the internet
Standard ACL outbound on R2 S0/0/0
Extended ACLs inbound on R1 G0/0 and G0/1
Refer to the exhibit. An administrator is trying to configure PAT on R1, but PC-A is unable to access the Internet. The administrator tries to ping a server on the Internet from PC-A and collects the debugs that are shown in the exhibit. Based on this output, what is most likely the cause of the problem?
The inside and outside NAT interlaces have been configured backwards
The inside global address is not on the same subnet as the ISP
The address on Fa0/0 should be 64.100.0.1.
The NAT source access list matches the wrong address range.
Why is QoS an important issue in a converged network that combines voice, video, and data communications?
Data communications must be given the first priority.
Voice and video communications are more sensitive to latency.
Legacy equipment is unable to transmit voice and video without QoS.
Data communications are sensitive to jitter.
Which statement describes a VPN?
VPNs use logical connections to create public networks through the Internet.
VPNs use open source virtualization software to create the tunnel through the Internet.
VPNs use dedicated physical connections to transfer data between remote users.
VPNs use virtual connections to create a private network through a public network.
In which OSPF state is the DR/BDR election conducted?
ExStart
Init
Two-Way
Exchange
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