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Security Chapter 6

Which of the following best describes the purpose of using subnets?
subnets divide an IP network address into multiple network addresses
Which of the following is not a reason to use subnets on a network?
combine different media type on to the same subnet
Which of the following IPV6 addresses is equivalent to the IPV4 loopback address of 127.0.0.1?
: :1
Which of the following IP addresses best describes an IPv6 address?
128- bit address
Eight hexadecimal quartets
Which of the following correctly describe the most common format for expressing IPv6 addresses?
Hexadecimal numbers
32 numbers, grouped using colons
Which of the following are valid IPv6 addresses?
141:0:0:15:0:0:1
6384:1319:7700:7631:446A:5511:8940:2552
Which of the following is a valid IPv6 address?
FECO ::AB:9007
Routers operate at what level of the Open System Interconnect model ?
Network Layer
You decided to use a subnet mask of 255.255.192.0 on the 172.17.0.0 network to create four separate subnets. Which network IDs will be assigned to these subnets in this configuration?
172.17.128.0.0
172.17.0.0
You have been using SNMP on your network for monitoring and management. You are concerned about the security of this configuration. What should you do?
Implement version 3 of SNMP
You want to implement a protocol on your network that allows computers to find the IP address of a host from a logical name. Which protocol should you implement?
DNS
Which of the following protocols allows hosts to exchange messages to indicate problems with packet delivery?
ICMP
You are configuring a network firewall to allow SMTP outbound email traffic and POP3 inbound email traffic. Which of the following TCP/IP ports should you open on the firewall?
25
110
Which port number is only used by SNMP
161
Which of the following ports does FTP use to establish sessions and manage traffic?
20, 21
Using the Netstat command you notice the remote system has made a connection to your Windows Server 2008 system using TCP/IP port 21. Which of the following actions is the remote system most likely to be performing?
Downloading a file
To increase security on your company’s internal network the admin has disabled as many ports as possible. Now however though you can browse the internet you are unable to perform secure credit card transactions. Which port needs to be enabled to allow secure transactions?
443
Which of the following network services or protocols uses TCP/IP port 22?
SSH
1. SNMP
2. SSH
3. TFTP
4. SCP
5. Telnet
6.HTTPS
7. HTTP
8. FTP
9. SMTP
10. POP3
1. 161 TCP and UDP
2. 22 TCP and UDP
3. 69 UDP
4. 22TCP and UDP
5. 23 TCP
6. 443 TCP and UDP
7. 80 TCP
8. 20 TCP
9. 25 TCP
10. 110 TCP
Which of the two following lists accurately describes TCP and UDP ?
UDP: connectionless, unreliable, unsequenced,low overheard

TCP: connection-oriented, reliable, sequenced, high overhead

You are an app developer creating apps for a wide variety of customers. In which two of the following situations would you select a connectionless protocol?
A gaming company wants to create a networked version of its latest game. Communication speed and reducing packet overhead are more important than error-free delivery

A company connects two networks through an expensive WAN link. The communication media is reliable but very expensive. They want to minimize connection times

You want to maintain tight security on your internal network so you can restrict access to the network through certain port numbers. If you want to allow users to continue to use DNS which port should you enable?
53
Your company’s network provides HTTP HTTPS and SSH access to remote employees. Which ports must be opened on the firewall to allow this traffic to pass?
80, 443, 22
Your network recently experienced a series of attacks aimed at the Telnet FTP services. You have rewritten the security policy to abolish the unsecured services and now you must secure the network using your firewall routers. Which ports must be closed to prevent traffic directed to these two services ?
23,21
Which of the following is the main difference between a DoS attack and a DDoS attack?
The DDoS attack uses zombie computers
An attacker sets up 100 drone computers that flood a DNS server with invalid requests. This is an example of which kind of attack?
DDoS
You suspect that an Xmas attack is occurring on the system. Which of the following could result if you do not stop the attack?
The system will be unavailable to respond to legitimate requests

The threat agent will obtain info about open ports on the system

You need to enumerate the devices on your network and display the configuration details of the network. Which of the following should you use?
nmap
An attacker is conducting passive reconnaissance on a targeted company. Which of the following could he be doing?
browsing the organization’s website
Which type of active scans turns off all flags in a TCP header?
Null
Which of the following Denial of Service (DOS) attacks uses ICMP packets and will only be successful if the victim has less bandwidth then the attacker?
Ping flood
In which of the following Denial of Service (DOS) attacks does the victim’s system rebuild invalid UDP packets causing them to crash or reboot?
Teardrop
A SYN packet is received by a server. The SYN packet has the exact same address for both the sender and receiver address, which is the address of the server. This is an example of what type of attack?
Land Attack
Which of the following is a form of denial of service attack that subverts the TCP three-way handshake process by attempting to open numerous sessions on a victim server but intentionally failing to complete the session by not sending the final required packet?
SYN flood
Which of the following is a form of denial of service attack that uses spoofed ICMP packets to flood a victim with echo requests using a bounce/amplification network?
Smurf
A SYN attack or a SYN flood exploits or alters which element of the TCP three-way handshake?
ACK
When a SYN is flood is altered so that the SYN packets are spoofed in order to define the source and destination address as a single victim IP address the attack is now called what ?
Land attack
A smurf attack requires all but which of the following elements to be implemented?
padded cell
Which of the following best describes the ping of death?
An ICMP packet that is larger than 65,536 bytes
Which of the following is the best countermeasure against man-in-the-middle attacks?
IPSec
What is modified in the most common form of spoofing on a typical IP packet
source address
Which type of denial of service (DoS) attack occurs when a name server receives malicious or misleading data that incorrectly maps host names and IP addresses?
DNS poisoning
Which of the following describes a man-in-the-middle attack?
a false server intercepts communications from a client by impersonating an intended server
Capturing packets as they travel from one host to another with the intent of altering contents of the packets is a form of which security concern?
man-in-the-middle attack
When the TCP/IP session state is manipulated so that a third party is able to insert alternate packets in the communication stream what type of attack has occurred?
Hijacking
What is the goal of TCP/IP hijacking attack?
Executing commands or accessing resources on a system the attacker does not otherwise have authorization to access
Which of the following is not a protection against session hijacking?
DHCP reservations
Which of the following is the most effective protection against IP packet spoofing on a private network?
Ingress and egress filters
While using the internet you type the URL of one of your favorite sites in the browser. Instead of going to the correct site, the browser displays a completely different website. When you use the IP address of the web server the correct site is displayed. What type of attack has likely occurred?
DNS poisoning
Which of the following attacks tries to associate an incorrect MAC address with a known IP address?
ARP poisoning
What are the most common network traffic packets captured and used in a replay attack?
Authentication
When a malicious user captures authentication traffic and replays it against the network later what is the security problem you are most concerned about?
an unauthorized user gaining access to sensitive resources
A router on the border of your network detects a packet with a source address that is from an internal client but the packet was received on the internet-facing interface. This is an example of what form of attack?
spoofing
An attacker uses an exploit to push a modified hosts file to client systems. This host file redirects traffic from legitimate tax preparation sites to malicious sites to gather personal and financial info. What kind of exploit has been used in this scenario?
Pharming

DNS poisoning

Which of the following is a privately controlled portion of a network that is accessible to some specific external entities?
Extranet
You are the office manager of a small financial credit business. Your company handles personal financial information for clients seeking small loans over the internet. You are aware of your obligation to secure clients records but budget is an issue. Which item would provide the best security for this situation?
all-in-one security appliance
You are implementing security at a local highschool that is concerned with students accessing inappropriate material on the internet from the library’s computers. The students will use the computers to search the internet for research paper content. The school budget is limited. Which content filtering option would you choose?
restrict content based on content categories
1. application-aware proxy
2. application-aware firewall
3. application-aware IDS
1. improves application performance
2. Enforces security rules based on application that is generating network traffic instead of the traditional port and protocol
3. analyzes network packets to detect malicious payloads targeted at application-layer services
Your company has a connection to the internet that allows users to access the internet You also have a web server and an email server that you want to make available to internet users. You want to create DMZ for these two servers. Which type of device should you use to create the DMZ?
Network based firewall
You have a company network that is connected to the internet. You want all users to have internet access but need to protect your private network and users. You also need to make a web server publicly available to internet users. Which solution should you use?
use firewalls to create a DMZ. Place the web server inside the DMZ and private network behind the DMZ
You have used firewalls to create a demilitarized zone. You have a web server that needs to be accessible to internet users. The web server must communicate with a database server for retrieving product, customer and order information. How should you place devices on the network to best protect the servers?
Put the database server on the private network

put the web server inside the DMZ

Of the following security zones which one can serve as a buffer network between a private secured network and the untrusted internet?
DMZ
Which of the following is likely to be located in a DMZ?
FTP server
Members of the sales team use laptops to connect to the company network. While traveling they connect their laptops to the internet through the airport and hotel networks. You are concerned that these computers will pick up viruses that could spread to your private network. You would like to implement a solution that prevents laptops from connecting to your network unless anti-virus software and the latest operating system patches have been installed. Which solution should you use?
NAC
In which of the following situations would you most likely implement Demilitarized zone (DMZ) ?
You want to protect a public webserver from attack
Which of the following terms describes a network device that is exposed to attacks and has been hardened against those attacks?
bastion or sacrificial host
Which of the following is a firewall function?
packet filtering
Which of the following are characteristics of a circuit-level gateway?
stateful

filters based on sessions

Which of the following are characteristics of a packet filtering firewall?
stateless
filters IP address and port
You want to install a firewall that can reject packets that are not part of an active session. Which type of firewall should you use?
circuit level
You provide internet access for a local school. You want to control internet access based on user and prevent access to specific URLs. Which type of firewall should you install?
Application level
Which of the following is the best device to deploy to protect your private network from a public untrusted network?
firewall
You have been given a laptop to use for work. You connect the laptop to your company network use it from home and for travel. You want to protect the laptop from internet based attacks. Which solution should you use?
host based firewall
You connect your computer to a wireless network available at the local library. You find that you can access all websites you want on the internet except for two. What might be causing the problem?
a proxy server is blocking access to the websites
Which of the following functions are performed by proxies?
Block employees from accessing certain web sites
cache web pages
Which of the following are true of a circuit proxy firewall ?
Verifies sequencing of session packets
operates at the session layer
Which of the following does a router acting as a firewall use to control which packets are forwarded or dropped ?
ACL
You have a router that is configured as a firewall. The router is a layer 3 device only. Which of the following does the router use for identifying allowed or denied packets ?
IP address
You have just installed a packet – filtering firewall on your network. What options will you be able to set on your firewall?
Port number
Source address of the packet
Destination address of the packet
When designing a firewall what is the recommended approach for opening and closing ports?
close all ports; open only ports required by applications inside the DMZ
Which of the following firewall types can be proxy between servers and clients?
Application layer firewall
circuit proxy firewall
You have a small network at home that is connected to the internet. On your home network you have a server with the IP address 192.168.55.199/16. You have a single public address that is shared by all hosts on your private network. You want to configure the server as a web server and allow internet hosts to contact the server to browse a personal website. You want to configure the server as a web server and allow Internet hosts to contact the server and browse a personal website. What should you use to allow access?
static NAT
You are the network admin for a small company that implements NAT to access the internet. However you recently acquired 5 servers that must be accessible from outside your network. Your ISP has provided you with 5 addt’l registered IP addresses to support these new servers but you don’t want the public to access these servers directly. You want to place these servers behind your firewall on the inside network yet still allow them to be accessible to the public from the outside? Which method of NAT translation should you implement for these 5 servers?
static
You want to connect your small company network to the internet. Your ISP provides you with a single IP address that is to be shared between all hosts on your private network. You do not want external hosts to be able to initiate connection to internal hosts. What type of network address translation (NAT) should you implement?
Dynamic
Which of the following is not one of the ranges of IP addresses defined in RFC 1918 that are commonly used behind a NAT server?
169.254.0.0 -169.254.255.255
Which of the following networking devices or services prevents the use of IPsec in most cases ?
NAT
Which of the following is not a benefit of NAT?
Improving the throughput rate of traffic
You have a group of salesmen who would like to access your private network through the internet while they are traveling. You want to control access to the private network through a single server. Which solution should you implement?
VPN concentrator
A VPN is used primarily for what purpose?
support secured communications over an untrusted network
Which VPN protocol typically employs IPsec as its data encryption mechanism?
L2TP
Which statement best describes IPsec when used in tunnel mode?
The entire data packet including headers is encapsulated
Which IPsec sub protocol provides data encryption?
ESP
Which of the following is not a VPN tunnel protocol?
RADIUS
Which is the best countermeasure for someone attempting to view your network traffic?
VPN
PPTP(Point to Point Tunneling Protocol) is quickly becoming obsolete because of what VPN protocol?
L2TP (Layer 2 Tunneling Protocol)
What is the primary use of tunneling?
Supporting private traffic through a public communication medium
In addition to Authentication Header(AH) IPsec is compromised of what other service?
Encapsulating Security Payload (ESP)
A salesperson in your organization spends most of her time traveling between customer sites. After a customer visit, she must complete various managerial tasks such as updating your organization’s order database. Because she rarely comes back to your home office she usually accesses the network from her notebook using a Wi-Fi access provided by hotels, restaurants and airports. Many of these locations provide unencrypted public Wi-Fi access and you are concerned that sensitive data could be exposed. To remedy this solution you decide to configure her notebook to use a VPN when accessing the home network over an open wireless connection. Which key steps should you take when implementing this configuration?
Configure the browser to send HTTPS requests through a VPN connection

Configure the VPN connection to use IPsec

What is the following is a valid security measure to protect email from viruses ?
use blockers on e-mail gateways
Which of the following prevents access based on website ratings and classifications?
content filter
1. prevents visiting malicious websites
2. prevents outsided attempts to access confidential information
3. identifies and disposes of infected content
4. prevents unwanted email from reaching your network
5. prevents visiting restricted websites
1 web threat filtering
2 anti phishing software
3 virus blockers
4 gateway e-mail spam blockers
5 URL content filtering
You are investigating the use of web site URL content filtering to prevent users from visiting certain web sites. Which benefits are the result of implementing this technology in your organization?
An increase to bandwidth availability

Enforcement of the organizations Internet usage policy

You have a company network with a single switch. All devices connect to the network through the switch. You want to control which devices will be able to connect to your network. For devices that do not have the latest operating system patches, you want to prevent access to all network devise except for a special server that holds the patches that the computers need to download. Which of the following components will be part of your solution?
802.1x authentication
Remediation servers
Which step is required to configure a NAP on a remote desktop (RD) gateway server?
Edit the properties for the server and select request clients to send a statement of health
In a NAP system what is the function of the System Health Validator ?
Compare the statement of health submitted by the client to the health requirements
How does IPsec NAP enforcement differ from the other NAP enforcement methods?
Clients must be issued a valid certificate before a connection to the private network is allowed
Which of the following wireless security methods uses a common key configured on the wireless access point and all wireless clients?
WEP WPA Personal and WPA2 Personal
Which of the following offers the weakest form of encryption for an 802.11 wireless network ?
WEP
Which of the following features are supplied by WPA2 on a wireless network?
Encryption
You need to secure your wireless network. Which security protocol would be the best choice?
WPA2
You need to configure a wireless network. You want to use WPA2 Enterprise. Which of the following components will be part of your design?
802.1x
AES Encryption
Which of the following locations will contribute the greatest amount of interference for a wireless access point?
Near cordless phones
Near backup generators
You need to implement a wireless network link between two buildings on a college campus. A wired network has already been implemented within each building. The buildings are 100 meters apart. What type of wireless antennae should you use on each side of the link?
High Gain
Parabolic
How does WPA2 differ from WPA?
WPA2 uses AES for encryption WPA uses TKIP
You need to configure the wireless network card to connect to your network at work. The connection should use a user name and password for authentication with AES encryption. What should you do?
Configure the connection to use WPA2-Enterprise
1. Short initialization vector makes key vulnerable
2. Uses AES for encryption
3. Uses RC4 for encryption
4. Uses TKIP for encryption
5. Uses CB-MAC for data integrity
6. Uses CCMP for key rotation
1. WEP
2. WPA2
3. WEP
4. WPA
5. WPA2
6. WPA2
You need to add security for your wireless network. You would like to use the most secure method. Which method should you implement?
WPA2
Which of the following is used on the wireless network to identify the network name?
SSID
Which of the following are true about Wi-Fi protected Access 2 (WPA2) ?
Uses AES for encryption and CBC-MAC for data integrity

Upgrading from a network using WEP typically requires installing new hardware

WiMAX is an implementation of which IEEE committee?
802.16
You want to connect a laptop computer running Windows 7 to a wireless network. The wireless network uses multiple access points and WPA2-Personal. You want to use the strongest authentication and encryption possible. SSID broadcast has been disabled. What should you do?
Configure the connection with a preshared key and AES encryption
Your company security policy states that wireless networks are not to be used because of the potential security risk they present to your network. One day you find that an employee has connected a wireless access point to the network in his office. What type of security risk is this?
Rogue access point
Which of the following describes marks that attackers place outside a building to identify an open wireless network?
War chalking
The process of walking around an office building with an 802.11 signal detector is known as what?
War driving
Which of the following best describes Bluesnarfing?
Unauthorized viewing calendar emails and messages on a mobile
Which of the following sends unsolicited business cards and messages to a Bluetooth device?
bluejacking
Which of the following is the best protection to prevent attacks on mobile phones through a Bluetooth protocol?
disable Bluetooth on the phone
You are troubleshooting a wireless connectivity issue in a small office. You determine that the 2.4 GHz cordless phones used in the office are interfering with the wireless network transmissions. If the cordless phones are causing interference, which of the following wireless standards could the network be using?
802.11g
Bluetooth
Your organization uses a 802.11g wireless network. Recently other tenants installed the following equipment in your building:

A wireless television distribution system running at 2.4 GHz
A wireless phone system running at 5.8 GHz
A wireless phone system running at 900 MHz
An 802.11 wireless network running at the 5GHz frequency range

Since this equipment was installed your wireless network has been experiencing significant interference. Which system is to blame?

The wireless TV system
Which of the following best describes evil twin?
An access point that is configured to mimic a valid access point to obtain logon credentials and other sensitive info
Network packet sniffing is often used to gain the info needed to conduct more specific and detailed attacks. Which of the following is the best defense against packet sniffing?
Encryption
Which of the following common network monitoring or diagnostic activity can be used as a passive malicious attack?
sniffing
You are concerned that wireless access points may have been deployed within your organization without authorization. What should you do?
Check the MAC address of devices connected to your wired switch

conduct a site survey

1. Spark jamming
2. Random noise jamming
3. Random pulse jamming
1. repeatedly blasts receiving equipment with high-intensity short duration RF bursts at a rapid pace
2. Produces RF signals using random amplitudes and frequencies
3. Uses radio signal pulses of random amplitude and frequency
An attacker has hidden an NFC reader behind an NFC-Based kiosk in an airport. The attacker uses the device to capture NFC data in transit between end-user devices and the reader in the kiosk. She then uses that info later on to masquerade as the original end-user device and establish an NC connection in the kiosk. What kind of attack has occurred in this scenario?
NFC relay attack
You are implementing a wireless network in a dentist’s office. The dentist’s practice is small so you choose to use an inexpensive consumer grade access point. While reading the documentation, you notice that the access point supports Wi-Fi protected Setup (WPS) using a pin. You are concerned about the security implication of this functionality. What should you do to reduce risk?
Disable WPS in the access point’s configuration
Which of the following measures will make your wireless network invisible to the casual attacker performing war driving?
Disable SSID broadcast
Which remote access authentication protocol allows for the use of smart cards for authentication?
EAP
Which of the following do switches and wireless access points use to control access through the device?
MAC filtering
You want to implement 802.11x authentication on your network Where would you configure passwords that are used for authentication?
on a RADIUS server
You are the wireless admin for your organization. As the size of your organization has grown you’ve decided to upgrade your wireless network to use 802.11x authentication instead of pre-shared keys. You’ve decided to use LEAP to authenticate wireless clients. To do this you configured a Cisco RADIUS server and installed the necessary Cisco client software on each RADIUS client. Which of the following is true concerning this implementation?
The system is vulnerable because LEAP is susceptible to dictionary attacks
You are the wireless admin for your organization. As the size of the organization has grown, you’ve decicided to upgrade your network to use 802.11x authentication instead of preshared keys. To do this you need to configure the RADIUS server and RADIUS clients. You want the server and the clients to manually authenticate each other. What should you do?
Configure all wireless access points with client certificates

Configure the RADIUS server with a server certificate

Which EAP implementation is most secure?
EAP-TLS
Which of the following features on a wireless network allows or rejects client connections based on a hardware address?
MAC address filtering
You’ve just finished installing a wireless access point for each client. What sh0uld you do to prevent unauthorized users from accessing the access point (AP) configuration utility?
change the admin password on AP
You are concerned about sniffing attacks on your wireless network. Which of the following implementations offers the best countermeasure to sniffing?
WPA2 with AES
What is the least secure place to locate an access point with Omni-directional antenna when creating a wireless cell?
near a window
What purpose does a wireless site survey serve?
To identify the coverage area and preferred placement of access points

To identify existing or potential sources of interference

You need to place a wireless access point in your two story building. While trying to avoid interference which of the following is the best location for the access point?
In the top floor

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