CCNA Module 16-17

When configuring 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.)

1. Configure the correct IP domain name. 2. Create a valid local username and password database. 3. Generate the asymmetric RSA keys. 4. line vty -> login local -> transport input ssh

Identify the steps needed to configure a switch for SSH.

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

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

DHCP

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.

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.

An administrator decides to use "12345678!" as the password on a newly installed router. Which statement applies to the password choice?

It is weak because it uses a series of numbers or letters.

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

Refer to the exhibit. Baseline documentation for a small company had ping round trip time statistics of 36/97/132 between hosts H1 and H3. Today the network administrator checked connectivity by pinging between hosts H1 and H3 that resulted in a round trip time of 1458/2390/6066. What does this indicate to the network administrator?

Something is causing a time delay between the networks.

A ping fails when performed from router R1 to directly connected router R2. The network administrator then proceeds to issue the show cdp neighbors command. Why would the network administrator issue this command if the ping failed between the two routers?

The network administrator wants to verify Layer 2 connectivity.

Which statement describes the ping and tracert commands?

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

What is the difference between a virus and a worm?

Worms self-replicate but viruses do not.

When applied to a router, which command would help mitigate brute-force password attacks against the router?

`login block-for 60 attempts 5 within 60`

A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?

an increase in host-to-host ping response times

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

What is the role of an IPS?

detecting and blocking of attacks in real time

A user wants to know the IP address of the PC. What is the best command to use to accomplish the task?

ipconfig

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

What feature of SSH makes it more secure than Telnet for a device management connection?

login information and data encryption

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

Packet Filtering

prevents or allows access based on IP or MAC addresses of the source and destination.

URL Filtering

prevents or allows access based on specific URLs or keywords.

Stateful Packet Inspection

prevents or allows access based on whether the traffic is in response to requests from internal hosts

Application Filtering

prevents or allows access to specific application types based on port numbers

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

reconnaissance

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

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

show ip route

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

Which command should be used on a Cisco router or switch to allow log messages to be displayed on remotely connected sessions using Telnet or SSH?

terminal monitor

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

the value of the configuration register

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

Which command has to be configured on the router to complete the SSH configuration?

transport input ssh

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

vty ports and console ports

An employee complains that a Windows PC cannot connect to the Internet. A network technician issues the ipconfig command on the PC and is shown an IP address of 169.254.10.3. Which two conclusions can be drawn? (Choose two.)

- The PC is configured to obtain an IP address automatically. - The PC cannot contact a DHCP server.

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