CH 16 - 17

Which statement is true about Cisco IOS ping indicators?​

'U' may indicate that a router along the path did not contain a route to the destination address and that the ping was unsuccessful.

What is considered the most effective way to mitigate a worm attack?

Download security updates from the operating system vendor and patch all vulnerable systems.

By following a structured troubleshooting approach, a network administrator identified a network issue after a conversation with the user. What is the next step that the administrator should take?

Establish a theory of probable causes.

When configuration SSH on a router to implement secure network management, a network engineer has issued the login local and transport input ssh line vty commands. What three additional configuration actions have to be performed to complete the SSH configuration? (Choose three.)

Generate the asymmetric RSA keys. Configure the correct IP domain name. Create a valid local username and password database.

Which method is used to send a ping message specifying the source address for the ping?

Issue the ping command without specifying a destination IP address.

A network technician issues the C:\> tracert -6 www.cisco.com command on a Windows PC. What is the purpose of the -6 command option?

It forces the trace to use IPv6.

A technician is to document the current configurations of all network devices in a college, including those in off-site buildings. Which protocol would be best to use to securely access the network devices?

SSH

Which statement describes the ping and tracert commands?

Tracert shows each hop, while ping shows a destination reply only.

Refer to the exhibit. Host H3 is having trouble communicating with host H1. The network administrator suspects a problem exists with the H3 workstation and wants to prove that there is no problem with the R2 configuration. What tool could the network administrator use on router R2 to prove that communication exists to host H1 from the interface on R2, which is the interface that H3 uses when communicating with remote networks?

an extended ping

What is an accurate description of redundancy?

designing a network to use multiple paths between switches to ensure there is no single point of failure

Users are complaining that they are unable to browse certain websites on the Internet. An administrator can successfully ping a web server via its IP address, but cannot browse to the domain name of the website. Which troubleshooting tool would be most useful in determining where the problem is?

nslookup

Which type of attack involves an adversary attempting to gather information about a network to identify vulnerabilities?

reconnaissance

Which command can an administrator execute to determine what interface a router will use to reach remote networks?

show ip route

A network administrator is upgrading a small business network to give high priority to real-time applications traffic. What two types of network services is the network administrator trying to accommodate? (Choose two.)

voice video

Why would a network administrator use the tracert utility?

to identify where a packet was lost or delayed on a network

What is the purpose of the network security authentication function?

to require users to prove who they are

Match the description to the type of firewall filtering. (Not all options are used.)

Application Filtering - prevents or allows access based on the port numbers used in the request Stateful packet inspection - prevents or allows access based on whether the traffic is in response to request from internal hosts URL Filtering - prevents or allows access based on web addresses or keywords Packet filtering - prevents or allows access based on the IP or MAC addresses of the source and destination

A user reports a lack of network connectivity. The technician takes control of the user machine and attempts to ping other computers on the network and these pings fail. The technician pings the default gateway and that also fails. What can be determined for sure by the results of these tests?

Nothing can be determined for sure at this point.

What is the advantage of using SSH over Telnet?

SSH provides secure communications to access hosts.

Students who are connected to the same switch are having slower than normal response times. The administrator suspects a duplex setting issue. What is the best command to use to accomplish the task?

show interfaces

Match each weakness with an example. (Not all options are used.)

Configuration Weakness - when implementing an access list on a router, a network engineer did not filter a type of malicious traffic. Technological weakness - A network engineer is examining the operating system of a network device for vulnerabilities. Security Policy Weakness - The network administrator did not fully consider the implications of unauthorized users accessing the network.

Which network service automatically assigns IP addresses to devices on the network?

DHCP

What information about a Cisco router can be verified using the show version command?

the value of the configuration register

What is the purpose of a small company using a protocol analyzer utility to capture network traffic on the network segments where the company is considering a network upgrade?

to document and analyze network traffic requirements on each network segment

A user is redesigning a network for a small company and wants to ensure security at a reasonable price. The user deploys a new application-aware firewall with intrusion detection capabilities on the ISP connection. The user installs a second firewall to separate the company network from the public network. Additionally, the user installs an IPS on the internal network of the company. What approach is the user implementing?

layered

A network engineer is troubleshooting connectivity issues among interconnected Cisco routers and switches. Which command should the engineer use to find the IP address information, host name, and IOS version of neighboring network devices?

show cdp neighbors detail

Identify the steps needed to configure a switch for SSH. The answer order does not matter. (Not all options are used.)

1. Create a local user 2. Generate RSA keys. 3. Config a domain name 4. Use the login local command 5. Use the transport input ssh command

Refer to the exhibit. An administrator is testing connectivity to a remote device with the IP address 10.1.1.1. What does the output of this command indicate?

A router along the path did not have a route to the destination.

Match the type of information security threat to the scenario. (Not all options are used.)

Data Lose - installing virus code to destroy surveillance recordings for certain days Identity theft - pretending to be someone else by using stolen personal information to apply for a credit card Disruption of Service - preventing users from accessing a website by sending a large number of link requests in a short period information Theft - obtaining trade secret documents illegally

On which two interfaces or ports can security be improved by configuration executive executive timeouts? (Choose two.)

console ports vty ports

Which example of malicious code would be classified as a Trojan horse?

malware that was written to look like a video game

Which attack involves a compromise of data that occurs between two end points?

man-in-the-middle attack

Which firewall feature is used to ensure that packets coming into a network are legitimate responses to requests initiated from internal hosts?

stateful packet inspection