CCNA 1 v7 Modules 16 – 17: Building and Securing a Small Network Exam
This flashcard set explores essential network security concepts including threat types, protection mechanisms like firewalls, and security functions such as authentication, authorization, and accounting. It also covers command-line security configurations and the distinctions between different types of malware and attacks.
Which component is designed to protect against unauthorized communications to and from a computer?
security center
port scanner
antimalware
antivirus
firewall
firewall
Key Terms
Which component is designed to protect against unauthorized communications to and from a computer?
security center
port scanner
antimalware
antivirus
firewall
firewall
Which command will block login attempts on RouterA for a period of 30 seconds if there are 2 failed login attempts within 10 seconds?
RouterA(config)# login block-for 10 attempts 2 within 30
RouterA(config)# login block-for 30 attempts 2 within 10
RouterA(config)# login block-for 2 attempts 30 within 10
RouterA(config)# login block-for 30 attempts 10 within 2
RouterA(config)# login block-for 30 attempts 2 within 10
What is the purpose of the network security accounting function?
to require users to prove who they are
to determine which resources a user can access
to keep track of the actions of a user
to provide challenge and response questions
to keep track of the actions of a user
Which example of malicious code would be classified as a Trojan horse?
malware that was written to look like a video game
malware that requires manual user intervention to spread between systems
malware that attaches itself to a legitimate program and spreads to other programs when launched
malware that can automatically spread from one system to another by exploiting a vulnerability in the target
malware that was written to look like a video game
What is the difference between a virus and a worm?
Viruses self-replicate but worms do not.
Worms self-replicate but viruses do not.
Worms require a host file but viruses do not.
Viruses hide in legitimate programs but worms do not.
Worms self-replicate but viruses do not.
Which attack involves a compromise of data that occurs between two end points?
denial-of-service
man-in-the-middle attack
extraction of security parameters
username enumeration
man-in-the-middle attack
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| Term | Definition |
|---|---|
Which component is designed to protect against unauthorized communications to and from a computer? security center | firewall |
Which command will block login attempts on RouterA for a period of 30 seconds if there are 2 failed login attempts within 10 seconds? RouterA(config)# login block-for 10 attempts 2 within 30 | RouterA(config)# login block-for 30 attempts 2 within 10 |
What is the purpose of the network security accounting function? to require users to prove who they are | to keep track of the actions of a user |
Which example of malicious code would be classified as a Trojan horse? malware that was written to look like a video game | malware that was written to look like a video game |
What is the difference between a virus and a worm? Viruses self-replicate but worms do not. | Worms self-replicate but viruses do not. |
Which attack involves a compromise of data that occurs between two end points? denial-of-service | man-in-the-middle attack |
Which type of attack involves an adversary attempting to gather information about a network to identify vulnerabilities? reconnaissance | reconnaissance |
What is the purpose of the network security authentication function? to require users to prove who they are | to require users to prove who they are |
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 | stateful packet inspection |
When applied to a router, which command would help mitigate brute-force password attacks against the router? exec-timeout 30 | login block-for 60 attempts 5 within 60 |
What feature of SSH makes it more secure than Telnet for a device management connection? confidentiality with IPsec | login information and data encryption |
What is the advantage of using SSH over Telnet? SSH is easier to use. | SSH provides secure communications to access hosts. |
What is the role of an IPS? detecting and blocking of attacks in real time | detecting and blocking of attacks in real time |
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? attack based | layered |
What is an accurate description of redundancy? configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination | designing a network to use multiple paths between switches to ensure there is no single point of failure |
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 | voice |
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 identify the source and destination of local network traffic | to document and analyze network traffic requirements on each network segment |
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? Switch# ping 10.1.1.1 Type escape sequence to abort. Connectivity to the remote device was successful. | A router along the path did not have a route to the destination. |
Which method is used to send a ping message specifying the source address for the ping? Issue the ping command from within interface configuration mode. | Issue the ping command without specifying a destination IP address. |
A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue? a change in the bandwidth according to the show interfaces output | an increase in host-to-host ping response times |
Which statement is true about Cisco IOS ping indicators? ‘!’ indicates that the ping was unsuccessful and that the device may have issues finding a DNS server. | ‘U’ may indicate that a router along the path did not contain a route to the destination address and that the ping was unsuccessful. |
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? The NIC in the PC is bad. | Nothing can be determined for sure at this point. |
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. | It forces the trace to use IPv6. |
Why would a network administrator use the tracert utility? to determine the active TCP connections on a PC | to identify where a packet was lost or delayed on a network |
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 suspects a virus because the ping command did not work. | The network administrator wants to verify Layer 2 connectivity. |
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 version | show cdp neighbors detail |
What information about a Cisco router can be verified using the show version command? the routing protocol version that is enabled | the value of the configuration register |
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? debug all | terminal monitor |
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines? terminal monitor | terminal monitor |
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? Verify full system functionality. | Establish a theory of probable causes. |
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? netstat | nslookup |
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 cannot contact a DHCP server. | The PC cannot contact a DHCP server. |
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? Picture with R1 - R2 traceroute | an extended ping |
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? Picture with R1 - R2 Connectivity between H1 and H3 is fine. | Something is causing a time delay between the networks. |
Which network service automatically assigns IP addresses to devices on the network? DHCP | DHCP |
Which command can an administrator execute to determine what interface a router will use to reach remote networks? show arp | show ip route |
On which two interfaces or ports can security be improved by configuring executive timeouts? (Choose two.) Fast Ethernet interfaces | console ports |
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.) Set the user privilege levels. | Generate the asymmetric RSA keys. |
What is considered the most effective way to mitigate a worm attack? Change system passwords every 30 days. | Download security updates from the operating system vendor and patch all vulnerable systems. |
Which statement describes the ping and tracert commands? Tracert shows each hop, while ping shows a destination reply only. | Tracert shows each hop, while ping shows a destination reply only. |
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? FTP | SSH |
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. PC0----SW0-----Router0 Which command has to be configured on the router to complete the SSH configuration? service password-encryption | transport input ssh |
An administrator decides to use “WhatAreyouwaiting4” as the password on a newly installed router. Which statement applies to the password choice? It is strong because it uses a passphrase. | It is strong because it uses a passphrase. |
An administrator decides to use “pR3s!d7n&0” as the password on a newly installed router. Which statement applies to the password choice? It is strong because it uses a minimum of 10 numbers, letters and special characters. | It is strong because it uses a minimum of 10 numbers, letters and special characters. |
An administrator decides to use “5$7*4#033!” as the password on a newly installed router. Which statement applies to the password choice? It is strong because it contains 10 numbers and special characters. | It is strong because it contains 10 numbers and special characters. |
An administrator decides to use “pR3s!d7n&0” as the password on a newly installed router. Which statement applies to the password choice? It is strong because it uses a minimum of 10 numbers, letters and special characters. | It is strong because it uses a minimum of 10 numbers, letters and special characters. |
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. | It is weak because it uses a series of numbers or letters. |
An administrator decides to use “admin” as the password on a newly installed router. Which statement applies to the password choice? It is weak because it is often the default password on new devices. | is weak because it is often the default password on new devices. |
An administrator decides to use “Feb121978” as the password on a newly installed router. Which statement applies to the password choice? It is weak because it uses easily found personal information. | It is weak because it uses easily found personal information. |
An administrator decides to use “password” as the password on a newly installed router. Which statement applies to the password choice? It is weak because it is a commonly used password. | It is weak because it is a commonly used password. |
An administrator decides to use “RobErT” as the password on a newly installed router. Which statement applies to the password choice? It is weak since it uses easily found personal information. | It is weak since it uses easily found personal information. |
An administrator decides to use “Elizabeth” as the password on a newly installed router. Which statement applies to the password choice? It is weak because it uses easily found personal information. | It is weak because it uses easily found personal information. |
A network technician is troubleshooting an issue and needs to verify the IP addresses of all interfaces on a router. What is the best command to use to accomplish the task? show ip interface brief | show ip interface brief |
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 | how interfaces |
A user wants to know the IP address of the PC. What is the best command to use to accomplish the task? ipconfig | ipconfig |
A student wants to save a router configuration to NVRAM. What is the best command to use to accomplish the task? copy running-config startup-config | copy running-config startup-config |
A support technician needs to know the IP address of the wireless interface on a MAC. What is the best command to use to accomplish the task? ipconfig getifaddr en0 | ipconfig getifaddr en0 |
A network technician is troubleshooting an issue and needs to verify all of the IPv6 interface addresses on a router. What is the best command to use to accomplish the task? show ipv6 interface | show ipv6 interface |
A teacher is having difficulties connecting his PC to the classroom network. He needs to verify that a default gateway is configured correctly. What is the best command to use to accomplish the task? ipconfig | ipconfig |
Only employees connected to IPv6 interfaces are having difficulty connecting to remote networks. The analyst wants to verify that IPv6 routing has been enabled. What is the best command to use to accomplish the task? show running-config | show running-config |
An administrator is troubleshooting connectivity issues and needs to determine the IP address of a website. What is the best command to use to accomplish the task? nslookup | nslookup |
What is a characteristic of UDP? UDP datagrams take the same path and arrive in the correct order at the destination. | UDP reassembles the received datagrams in the order they were received. |
Match the description to the type of firewall filtering. (Not all options are used.) (stateful packet inspection) (URL filtering) (application filtering) (packet filtering) prevents or allows access based on prevents or allows access based on prevents or allows access based on prevents or allows access based on prevents or allows access based on | prevents or allows access based on prevents or allows access based on (application filtering) prevents or allows access based on (stateful packet inspection) prevents or allows access based on (URL filtering) prevents or allows access based on (packet filtering) |
Identify the steps needed to configure a switch for SSH. The answer order does not matter. (Not all options are used.)^ Create a local user. Generate RSA keys. Use the login command. Configure a domain name. Use the login local command. Use the password cisco command. Use the transport input ssh command. required steps for SSH configuration | required steps for SSH configuration Create a local user. Generate RSA keys. Configure a domain name. Use the login local command. Use the transport input ssh command. |
Match the type of information security threat to the scenario. (Not all options are used.) information theft identity theft data loss disruption of service installing virus code to destroy surveillance pretending to be someone else by using stolen personal information to apply for a credit card preventing users from accessing a website by sending a large number of link requests in a short period obtaining trade secret documents illegally cracking the password of an administrator account on a server | installing virus code to destroy surveillance pretending to be someone else by using stolen personal information to apply for a credit card - identity theft preventing users from accessing a website by sending a large number of link requests in a short period - disruption of service obtaining trade secret documents illegally - information theft cracking the password of an administrator account on a server |
Match each weakness with an example. (Not all options are used.) technological weakness configuration weakness security policy weakness | An employee is trying to guess the password of another user. When implementing an access list on a router, a network engineer did not filter a type of malicous traffic. - configuration weakness A nework engineer is examining the operating system of a network device for vulnerabilities. - technological weakness The network administrator did not fully consider the implications of unauthorized users accessing the network. - security policy weakness |