CCNA Security Chapter 1

Below you will find the assessment items as presented on the exam as well as the scoring rules associated with the item.

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1 What is a ping sweep?

A ping sweep is a network scanning technique that indicates the live hosts in a range of IP addresses.

A ping sweep is a software application that enables the capture of all network packets sent across a LAN.

A ping sweep is a scanning technique that examines a range of TCP or UDP port numbers on a host to detect listening services.

A ping sweep is a query and response protocol that identifies information about a domain, including the addresses assigned to that domain.

Observable Description Max Value

1 correctness of response

2 points for Option 1 0 points for any other option

2

This item references content from the following areas: CCNA Security: Implementing Network Security

1.3.1 Reconnaissance Attacks

2 Which access attack method involves a software program attempting to discover a system password by using an electronic dictionary?

buffer overflow attack

port redirection attack

Denial of Service attack

brute-force attack

IP spoofing attack

packet sniffer attack




2


1.3.2 Access Attacks

3 How is a Smurf attack conducted?

by sending a large number of packets, overflowing the allocated buffer memory of the target device

by sending an echo request in an IP packet larger than the maximum packet size of 65,535 bytes

by sending a large number of ICMP requests to directed broadcast addresses from a spoofed source address on the same network

by sending a large number of TCP SYN packets to a target device from a spoofed source address




2


1.3.3 Denial of Service Attacks

4 A port scan is classified as what type of attack?

access attack

Denial of Service attack

reconnaissance attack

spoofing attack




2



5 What are the basic phases of attack that can be used by a virus or worm in sequential order?

paralyze, probe, penetrate, persist, and propagate

probe, penetrate, persist, propagate, and paralyze

penetrate, persist, propagate, paralyze, and probe

persist, propagate, paralyze, probe, and penetrate




2


1.2.2 Worms

6 What are the three major components of a worm attack? (Choose three.)

enabling vulnerability

infecting vulnerability

payload

penetration mechanism

probing mechanism

propagation mechanism



Option 1, Option 3, and Option 6 are correct. 1 point for each correct option. 0 points if more options are selected than required.

3


1.2.2 Worms

7 Which type of software typically uses a network adapter card in promiscuous mode to capture all network packets that are sent across a LAN?

port scanner

ping sweeper

packet sniffer

Internet information query




2



8 An attacker is using a laptop as a rogue access point to capture all network traffic from a targeted user. Which type of attack is this?

trust exploitation

buffer overflow

man in the middle

port redirection




2



9 Which three options describe the phases of worm mitigation? (Choose three.)

The containment phase requires the use of incoming and outgoing ACLs on routers and firewalls.

The containment phase tracks down and identifies the infected machines within the contained areas.

The inoculation phase disconnects, blocks, or removes infected machines.

The inoculation phase patches uninfected systems with the appropriate vendor patch for the vulnerability.

The quarantine phase terminates the worm process, removes modified files or system settings, and patches the vulnerability the worm used to exploit the system.

The treatment phase disinfects actively infected systems.



Option 1, Option 4, and Option 6 are correct. 1 point for each correct option. 0 points if more options are selected than required.

3


1.2.4 Mitigating Viruses, Worms, and Trojan Horses

10 Which phase of worm mitigation requires compartmentalization and segmentation of the network to slow down or stop the worm and prevent currently infected hosts from targeting and infecting other systems?

containment phase

inoculation phase

quarantine phase

treatment phase




2



11 What is a characteristic of a Trojan Horse?

A Trojan Horse can be carried in a virus or worm.

A proxy Trojan Horse opens port 21 on the target system.

An FTP Trojan Horse stops anti-virus programs or firewalls from functioning.

A Trojan Horse can be hard to detect because it closes when the application that launched it closes.




2


1.2.3 Trojan Horses

12 Which two statements are characteristics of a virus? (Choose two.)

A virus typically requires end-user activation.

A virus has an enabling vulnerability, a propagation mechanism, and a payload.

A virus replicates itself by independently exploiting vulnerabilities in networks.

A virus provides the attacker with sensitive data, such as passwords.

A virus can be dormant and then activate at a specific time or date.



Option 1 and Option 5 are correct. 1 point for each correct option. 0 points if more options are selected than required.

2



13 Which two are characteristics of DoS attacks? (Choose two.)

They always precede access attacks.

They attempt to compromise the availability of a network, host, or application.

They are difficult to conduct and are initiated only by very skilled attackers.

They are commonly launched with a tool called L0phtCrack.

Examples include smurf attacks and ping of death attacks.




2


1.3.3 Denial of Service Attacks

14 Which two statements describe access attacks? (Choose two.)

Port redirection attacks use a network adapter card in promiscuous mode to capture all network packets that are sent across a LAN.

Password attacks can be implemented using brute-force attack methods, Trojan Horses, or packet sniffers.

Buffer overflow attacks write data beyond the allocated buffer memory to overwrite valid data or exploit systems to execute malicious code.

Port scanning attacks scan a range of TCP or UDP port numbers on a host to detect listening services.

Trust exploitation attacks can use a laptop acting as a rogue access point to capture and copy all network traffic in a public location on a wireless hotspot.




2



15 A disgruntled employee is using Wireshark to discover administrative Telnet usernames and passwords. What type of network attack does this describe?

Denial of Service

port redirection

reconnaissance

trust exploitation




2



16 Which two network security solutions can be used to mitigate DoS attacks? (Choose two.)

virus scanning

data encryption

anti-spoofing technologies

intrusion protection systems

applying user authentication




2


1.3.4 Mitigating Network Attacks

17 Users report to the helpdesk that icons usually seen on the menu bar are randomly appearing on their computer screens. What could be a reason that computers are displaying these random graphics?

An access attack has occurred.

A virus has infected the computers.

A DoS attack has been launched against the network.

The computers are subject to a reconnaissance attack.




2


1.2.1 Viruses

18 A network administrator detects unknown sessions involving port 21 on the network. What could be causing this security breach?

An FTP Trojan Horse is executing.

A reconnaissance attack is occurring.

A denial of service attack is occurring.

Cisco Security Agent is testing the network.




2


1.2.3 Trojan Horses

19 Which statement accurately characterizes the evolution of network security?

Internal threats can cause even greater damage than external threats.

Internet architects planned for network security from the beginning.

Early Internet users often engaged in activities that would harm other users.

Threats have become less sophisticated while the technical knowledge needed by an attacker has grown.




2


1.1.1 Evolution of Network Security

20 What is considered a valid method of securing the control plane in the Cisco NFP framework?

authorization of actions

DHCP snooping

dynamic ARP inspection

login and password policy

routing protocol authentication

role-based access control




2


1.4.1 NFP

21 What are two reasons for securing the data plane in the Cisco NFP framework? (Choose two.)

to protect against DoS attacks

to provide bandwidth control

to force technicians to use SSH and HTTPS when managing devices

to provide a record of who accessed the device, what occurred, and when it occurred

to allow users to control the flow of traffic that is managed by the route processor of their network devices




2


1.4.1 NFP

22 Which type of security threat can be described as software that attaches to another program to execute a specific unwanted function?

virus

worm

proxy Trojan Horse

Denial of Service Trojan Horse




2


1.2.1 Viruses

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CCNA Security Chapter 1