Chapter 5 & 6 Cyber Test

Your Cisco router has three network interfaces configured. S0/1/0 is a WAN interface that is connected to an ISP. F0/0 is connected to an Ethernet LAN segment with a network address of 192.168.1.0/24. F0/1 is connected to an Ethernet LAN segment with a network address of 192.168.2.0/24. You have configured an access control list on this router using the following rules: deny ip 192.168.1.0 0.0.0.255 any deny ip 192.168.2.0 0.0.0.255 any These rules will be applied to the WAN interface on the router. Your goal is to block any IP traffic coming in on the WAN interface that has a spoofed source address that makes it appear to be coming from the two internal networks. However, when you enable the ACL, you find that no traffic is being allowed through the WAN interface. What should you do?

Add a permit statement to the bottom of the access list.

You have a network that's connected using a physical star topology. One of the drop cables connecting a workstation has been removed. Which of the following BEST describes the effect that this will have on network communications?

All devices except the device connected with the drop cable will be able to communicate.

During a network infrastructure upgrade, you replaced two 10 Mbps hubs with switches and upgraded from a Category 3 UTP cable to a Category 5e. During the process, you accidentally cut the Cat 5e patch cable that stretches from the network printer to the upgraded switch. What is the impact on your network?

All network nodes except the printer will be available.

Which of the following describes how access control lists can improve network security?

An access control list filters traffic based on the IP header information, such as source or destination IP address, protocol, or socket number.

Which of the following is true about an intrusion detection system?

An intrusion detection system monitors data packets for malicious or unauthorized traffic.

You are implementing a SOHO network for a local business. The ISP has already installed and connected a cable modem for the business. The business has four computers that need to communicate with each other and the internet. The ISP's cable modem has only one RJ45 port. You need to set up the network within the following parameters: You must spend as little money as possible. You must not purchase unnecessary equipment. Computers need to have a gigabit connection to the network. New devices should not require management or configuration. You examine each computer and notice that only one of the four computers has a wireless NIC. They all have Ethernet NICs. What should you purchase?

An unmanaged switch and CAT 5e cabling.

You are moving a client to a new location within an Ethernet network. Previous to the move, the client system did not have difficulty accessing the network. During the relocation, you attach patch cables from the client system to the wall jack and from the patch panel to the switch. Once connected, you do not get a link light on the network card or the switch. You swap out the cable running between the patch panel and the switch with a known good one, but you still cannot connect. Which of the following might you suspect is the problem?

Failed patch cable between the client system and the wall jack

Which IDS traffic assessment indicates that the system identified harmless traffic as offensive and generated an alarm or stopped the traffic?

False positive

Upon conducting a visual inspection of the server room, you see that a switch displays LED collision lights that are continually lit. You check the LED on the corresponding workstation and see that it is flashing rapidly even though it is not sending or receiving network traffic at that time. What is the cause of the network collisions?

Faulty network card

Which type of cabling do Ethernet 100BaseFX networks use?

Fiber optic

Which of the following chains is used for incoming connections that aren't delivered locally?

Forward

Which of the following are true about reverse proxy? (Select two.)

Handles requests from the internet to a server on a private network. & Can perform load balancing, authentication, and caching.

As a security precaution, you've implemented IPsec to work between any two devices on your network. IPsec provides encryption for traffic between devices. You would like to implement a solution that can scan the contents of the encrypted traffic to prevent any malicious attacks. Which solution should you implement?

Host-based IDS

You have been given a laptop to use for work. You connect the laptop to your company network, use the laptop from home, and use it while traveling. You want to protect the laptop from internet-based attacks. Which solution should you use?

Host-based firewall

You're concerned about attacks directed at your network firewall. You want to be able to identify and be notified of any attacks. In addition, you want the system to take immediate action to stop or prevent the attack, if possible. Which tool should you use?

IPS

Which of the following is true about an NIDS?

It detects malicious or unusual incoming and outgoing traffic in real time.

You have a network that's connected using a physical bus topology. One of the cables that connects a workstation to the bus breaks. Which of the following BEST describes the effect that this will have on network communications?

No devices will be able to communicate.

Which IDS type can alert you to trespassers?

PIDS

Which of the following is a firewall function?

Packet filtering

What do you need to configure on a firewall to allow traffic directed to the public resources on the screened subnet?

Packet filters

Which options are you able to set on a firewall? (Select three.)

Port number, Packet source address, & Packet destination address

You have used firewalls to create a screened subnet. You have a web server that needs to be accessible to internet users. The web server must communicate with a database server to retrieve product, customer, and order information. How should you place devices on the network to best protect the servers? (Select two.)

Put the database server on the private network. & Put the web server inside the screened subnet.

You are managing a network and have used firewalls to create a screened subnet. You have a web server that internet users need to access. It must communicate with a database server to retrieve product, customer, and order information. How should you place devices on the network to best protect the servers? (Select two.)

Put the web server inside the screened subnet. & Put the database server on the private network.

Which of the following connectors is typically used for the ends of a rollover cable?

RJ45 & Serial

Which of the following standards does a rollover cable typically use?

RS232

A user from the sales department calls to report that he is experiencing problems connecting to the sales file server. All users in the sales department connect to this server through a single Ethernet switch. No other users have reported problems connecting to the sales server. Which of the following troubleshooting actions are you MOST likely to perform first?

Replace the network card in the user's computer.

Based on the diagram, which type of proxy server is handling the client's request?

Reverse proxy server

You have purchased a new router that you need to configure. You need to connect a workstation to the router's console port to complete the configuration tasks. Which type of cable would you most likely use?

Rollover

Which of the following connections would you use a straight-through cable for?

Router to a regular port on a switch

Which of the following uses access control lists (ACLs) to filter packets as a form of security?

Screened router

Which of the following can serve as a buffer zone between a private, secured network and an untrusted network?

Screened subnet

Which of the following is another name for a firewall that performs router functions?

Screening router

Which IDS method searches for intrusion or attack attempts by recognizing patterns or identifying entities listed in a database?

Signature-based IDS

Which of the following physical topologies are used with Ethernet networks? (Select two.)

Star and Bus

Which of the following are characteristics of a packet-filtering firewall? (Select two.)

Stateless & Filters IP address and port

You need to connect a workstation to a switch using a regular port on the switch (not an uplink port). The switch does not support auto-MDI. Which type of cable should you use?

Straight-through

Angela is the network administrator for a rapidly growing company with a 100BaseT network. Users have recently complained about slow file transfers. While checking network traffic, Angela discovers a high number of collisions. Which connectivity device would BEST reduce the number of collisions and allow future growth?

Switch

Which of the following describes the worst possible action by an IDS?

The system identified harmful traffic as harmless and allowed it to pass without generating any alerts.

How many network interfaces does a dual-homed gateway typically have?

Three

Which device combines multiple security features, such as anti-spam, load-balancing, and antivirus, into a single network appliance?

Unified Threat Management (UTM)

Which of the following combines several layers of security services and network functions into one piece of hardware?

Unified Threat Management (UTM)

You've just installed a new network-based IDS system that uses signature recognition. What should you do on a regular basis?

Update the signature files.

You have a company network that is connected to the internet. You want all users to have internet access, but you need to protect your private network and users. You also need to make a web server publicly available to the internet users. Which solution should you use?

Use firewalls to create a screened subnet. Place the web server inside the screened subnet and the private network behind the screened subnet.

Which of the following are specific to extended Access control lists? (Select two.)

Use the number ranges 100-199 and 2000-2699. & Are the most used type of ACL.

Which of the following is the BEST solution to allow access to private resources from the internet?

VPN

Which of the following is true about a firewall?

You must manually specify which traffic you want to allow through the firewall. Everything else is blocked.

In which of the following situations would you MOST likely implement a screened subnet?

You want to protect a public web server from attack.

Which IDS method defines a baseline of normal network traffic and then looks for anything that falls outside of that baseline?

Anomaly-based

Which of the following terms describes a network device that is exposed to attacks and has been hardened against those attacks?

Bastion

Which of the following does the sudo iptables -F command accomplish?

Clears all the current rules.

Which of the following is true about half-duplex mode?

Collision detection is turned on.

You want to create a loopback plug using a single RJ45 connector. How should you connect the wires in the connector?

Connect pin 1 to pin 3 and pin 2 to pin 6.

You want to create a rollover cable that has an RJ45 connector on both ends. How should you connect the wires within the connectors?

Connect pin 1 to pin 8, pin 2 to pin 7, pin 3 to pin 6, and pin 4 to pin 5.

Which of the following are true about routed firewalls? (Select two.)

Counts as a router hop. & Supports multiple interfaces.

You need to connect two switches using their uplink ports. The switches do not support auto-MDI. Which type of cable should you use?

Crossover

You need to transfer data from one laptop to another, and you would like to use an Ethernet cable. You do not have a hub or a switch. Which type of cable should you use?

Crossover

You want to connect the LAN port on a router to the uplink port on a switch. The switch does not support auto-MDI. Which type of cable should you use?

Crossover

Which of the following BEST describes a stateful inspection?

Determines the legitimacy of traffic based on the state of the connection from which the traffic originated.

You have a network that's connected using a full physical mesh topology. The link between Device A and Device B is broken. Which of the following BEST describes the effect that this will have on network communications?

Device A will be able to communicate with all other devices.

Your network follows the 100Base-TX specifications for Fast Ethernet. What is the maximum cable segment length allowed?

100 meters

Which Gigabit Ethernet standard uses multimode fiber optic cabling and supports network segments up to a maximum of 550 meters long?

1000Base-SX

Which Gigabit Ethernet standard can support long network segments up to a maximum of 5 km when used with single-mode fiber optic cable?

1000BaseLX

You want to implement an Ethernet network at very long distances using fiber optic cables. Which standard and cable type would you choose? (Select two.)

1000BaseLX & Single-mode fiber

You have been tasked with designing an Ethernet network. Your client needs to implement a very high-speed network backbone between campus buildings, some of which are around 300 meters apart. Multimode fiber optic cabling has already been installed between buildings. Your client has asked that you use the existing cabling. Which Ethernet standard meets these guidelines? (Choose two.)

10GBase-SR & 1000Base-SX

You would like to implement 10 Gbps Ethernet over a distance of 1 kilometer or greater. Which of the following would be the minimum requirement for this implementation? (Select two.)

10GBaseLR standards & Single-mode fiber

Your network follows the 100Base-FX specifications for Fast Ethernet and uses half-duplex multimode cable. What is the maximum cable segment length allowed?

412 meters

Your company has an internet connection. You also have a web server and an email server that you want to make available to your internet users, and you want to create a screened subnet for these two servers. Which of the following should you use?

A network-based firewall

Which of the following is true about a network-based firewall?

A network-based firewall is installed at the edge of a private network or network segment.

How does a proxy server differ from a packet-filtering firewall?

A proxy server operates at the Application layer, while a packet-filtering firewall operates at the Network layer.

You have just connected four new computer systems to an Ethernet switch using spare patch cables. After the installation, only three systems are able to access the network. You verify all client network settings and replace the network card in the failed system. The client is still unable to access the network. Which of the following might you suspect is the real cause of the problem?

Failed patch cable