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Network Fundamentals Q&A.
Which of the following is the backbone or local area network that connects multiple access points (and basic service sets) together? - Correct Answer: DS You are configuring a wireless network with two wireless access points. Both access points connect to the same wired network. You want wireless users to be able to connect to either access point and have the ability to roam between the two access points. How should you configure the access points? - Correct Answer: Same SSID, different channel Which of the following wireless network protection methods prevents the broadcasting of the wireless network name? - Correct Answer: SSID broadcast Which of the following best describes a site survey? - Correct Answer: A process of planning and designing a wireless network. Which of the following best describe a spectrum analyzer? - Correct Answer: A tool used to determine the noise floor in the desired frequency range. Which of the following should you include in your site survey test equipment? ( Select two.) - Correct Answer: A spectrum analyzer A tall ladder You want to connect your client computer to a wireless access point that is connected to your wired network at work. The network administrator tells you that the access point is configured to use WPA2 Personal with the strongest encryption method possible. SSID broadcast is turned off.
Network Fundamentals Q&A.
Which of the following must you configure manually on the client? (Select three.) - Correct Answer: SSID AES Preshared Key You have physically added a wireless access point to your network and installed a wireless networking card in two laptops running Windows. Neither laptop can find the network, and you have concluded that you must manually configure the wireless access point (AP). Which of the following values uniquely identifies the network AP? - Correct Answer: SSID You have decided to conduct a business meeting at a local coffee shop. The coffee shop you chose has a wireless hotspot for customers who want internet access. You decide to check your email before the meeting begins. When you open the browser, you cannot gain internet access. Other customers are using the internet without problems. You are sure your laptop's wireless adapter works because you use a wireless connection at work. What is the likely cause of the problem? - Correct Answer: A mismatched SSID. Match each wireless signaling method on the left with its definition on the right. (Not all of the signaling methods match a definition.) - Correct Answer: Uses a narrow frequency band and hops data signals in a predictable sequence. : FHSS Breaks data into pieces and sends the pieces across multiple frequencies in a defined range. : DSSS Breaks data into very small data streams in order to send the information across long distances. : OFDM
Network Fundamentals Q&A.
What should you do? (Select two. Each response is a part of the complete solution.) - Correct Answer: Configure all wireless access points with client certificates. Configure the RADIUS server with a server certificate. You are concerned that wireless access points may have been deployed within your organization without authorization. What should you do? (Select two. Each response is a complete solution.) - Correct Answer: Check the MAC addresses of devices connected to your wired switch. Conduct a site survey. An attacker is trying to compromise a wireless network that has been secured using WPA2-PSK and AES. She first tried using AirSnort to capture packets, but found that she couldn't break the encryption. As an alternative, she used software to configure her laptop to function as an access point. She configured the fake access point with the same SSID as the wireless network she is trying to break into. When wireless clients connect to her access point, she presents them with a web page that asks them to enter the WPA2 passphrase. When they do, she uses the password to connect a wireless client to the real access point. Which attack techniques did the attacker use in this scenario? (Select two.) - Correct Answer: Pharming Evil twin 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.
Network Fundamentals Q&A.
What type of security risk is this? - Correct Answer: Rogue access point Which of the following measures makes your wireless network invisible to the casual attacker performing war driving? - Correct Answer: Disable SSID broadcast. Which of the following allows multiple virtual machines to exist on the same physical machine and share its underlying physical resources? - Correct Answer: Virtualization When additional resources are needed on a virtual machine, the hypervisor increases available resources up to the maximum set amount. What is this process called? - Correct Answer: Thin provisioning An Ethernet frame has just arrived on a switch port. The switch examines the destination MAC address of the frame. It is a unicast address, but no mapping exists in the CAM table for the destination address. Assuming that no VLANs are configured, what happens next? - Correct Answer: The switch sends a copy of the frame to all connected devices on all ports. Device B sends a frame to Device A on the network shown. The switch has an entry in its CAM table for Device A in its database, but not for Device B. Which of the following best describes what the switch does with the message? - Correct Answer: The switch records the address and port for Device B in its database. It sends the frame out port Fa0/1. You have a switch connected to a small network as shown. A hub connects Wrk1 and Wrk5 to the switch. The switch has the following information in its CAM table:
Network Fundamentals Q&A.
Company AGH is especially concerned about the security of information within the Accounting department. Which segmentation device meets the functionality requirements and provides the simplest, most economical administration? - Correct Answer: Router During the initial setup of a router, which of the following commands would set the host name as LAS? - Correct Answer: Router(config)#hostname LAS You just installed a new router (RTR07) in a field office. As part of the initial setup, you want to configure a description for the eighth gigabit Ethernet interface. Which of the following would set the description to WAN to Main Office? - Correct Answer: RTR07(config)#int gi0/ RTR07(config)#description WAN to Main Office Which of the following statements are true about bridges? (Select two.) - Correct Answer: Bridges connect two network segments with the same network address Bridges convert one type of transmission medium into another. At which layer of the OSI model do network switches operate that do not support routing?
- Correct Answer: Data Link Which of the following accurately describe how switches and hubs work? (Select two.) - Correct Answer: A hub repeats frames to all ports, regardless of the destination address. Switches use the hardware address in the frame to send it only to the port where the device is located. You want to prevent collisions on your network by creating separate collision domains and defining virtual LANs. Which of the following devices should you choose? - Correct Answer: Switch
Network Fundamentals Q&A.
Which is the primary role of a firewall? - Correct Answer: To protect networks and workstations by allowing or denying network traffic. The firewall does this using a configured set of rules. Match the firewall types on the left with the characteristics shown on the right. (Firewall types may be used more than once.) - Correct Answer: Usually a software firewall:Host-based firewall Most robust and secure firewall:Network-based firewall Considered a hardware firewall:Network-based firewall Installed on a single computer:Host-based firewall Installed on the edge of a network:Network-based firewall Less robust and less customizable:Host-based firewall Which of the following describes the function of a dedicated wireless access point on a network? - Correct Answer: On a network, a wireless access point only acts as a bridge between the wireless segment and the wired segment on the same subnet. You have a network consisting of a switch, a router, a hub, and several workstations connected as shown in the graphic. No VLANs have been configured. How many collision domains exist on the network shown? - Correct Answer: 4 You are the network administrator for a rapidly growing company with a 100BaseT network. Users have recently complained about slow file transfers. In a check of network traffic, you discover a high number of collisions. Which connectivity device would best reduce the number of collisions and prepare for future growth? - Correct Answer: Switch
Network Fundamentals Q&A.
Match each WAN topology to its description. Each topology will only be used once. - Correct Answer: Connects multiple network locations to each other via WAN links. Each location has a direct link to all other locations. : Full mesh Connects multiple remote networks via WAN links. One site is the main location. : Hub and spoke A single, pre-established path from one network location, through a carrier network, and to a remote network location. : Point-to-point Provides two separate physical connects to a single ISP. : Dual-homed A network connected to an ISP using a single line. : Single-homed Which switching network type allows data connections that can be initiated when needed and terminated when communication is complete? - Correct Answer: Circuit Which of the following is an example of a public WAN? - Correct Answer: Cable Internet Which cellular network type can, theoretically, provide speeds up to 10Gbps? - Correct Answer: 5G Which of the following is true regarding WAN leased lines? - Correct Answer: The speed is symmetric. Each router runs in full-duplex. Which is the default Layer 2 encapsulation method for serial interfaces on a Cisco router? - Correct Answer: HDLC Drag each leased line component on the left with its corresponding description on the right. Each component may be used once, more than once, or not at all. - Correct Answer: Connects the WIC in the router to the telecom equipment. : Serial cable
Network Fundamentals Q&A.
Controls the speed and timing of the router's serial interfaces. : CSU/DSU Provides the clocking function on the link. : CSU/DSU The equipment at the customer site. : CPE Provides a Layer 1 interface between the router and the telecom provider's equipment. : CSU/DSU What is the removable card that contains the serial interface on a router called? - Correct Answer: WIC Which of the following is a type of line supported by a leased line? - Correct Answer: T T What is the first step when troubleshooting a serial link? - Correct Answer: Isolate the fault domain Which tool can be used to verify Network layer connectivity? - Correct Answer: Ping A failed ping or traceroute test might indicate a problem on which layers? (Select three.) - Correct Answer: Layer 1 Layer 2 Layer 3 You are troubleshooting connectivity issues. You had a successful ping test, but your Telnet test failed. What does this tell you? - Correct Answer: The Network layer has connectivity. On which layer of the OSI model does routing occur? - Correct Answer: Network
Network Fundamentals Q&A.
Which of the following actions would help accomplish this goal? - Correct Answer: Enable content filtering A technician receives notification from a SOHO router manufacturer of a specific vulnerability that allows attackers to exploit SNMP traps to take over the router. The technician verifies the settings outlined in the notification. Which of the following actions should the technician take next? - Correct Answer: Check for and apply firmware updates. A SOHO customer finds that their VoIP conversations frequently break up and become unintelligible. This happens most often when one person in the office streams video from the internet. Which of the following configuration changes on the SOHO router is most likely to improve VoIP performance? - Correct Answer: Change QoS settings to give VoIP traffic more priority. A technician is replacing a SOHO router and has configured DHCP to assign private IP addresses to hosts on the local network. These hosts can communicate with each other, but users can't browse the internet. Which of the following changes to the SOHO router is most likely to restore internet connectivity? - Correct Answer: Configure the SOHO router for NAT. Which of the following locations will contribute the greatest amount of interference for a wireless access point? (Select two.) - Correct Answer: Near cordless phones Near backup generators A technician is installing a new SOHO wireless router in a home office. The customer wants to secure the wireless network so only a smartphone, tablet, and laptop can connect. Which of the following router settings should the technician change? - Correct Answer: Enable MAC filtering
Network Fundamentals Q&A.
Which of the following is used on a wireless network to identify the network name? - Correct Answer: SSID Which of the following is true when the DHCP setting is disabled in a wireless network? - Correct Answer: Wireless clients must use a static IP address within the correct IP address range to connect to the network. Match each wireless device on the left with its corresponding characteristics on the right. Each device may be used once, more than once, or not at all. - Correct Answer: Manages all of the APs that are connected to it. : Wireless controller Supports 30 to 50 wireless clients per access point. : Wireless controller Provides NAT routing and an Ethernet switch in one device. : Consumer-grade (SOHO) wireless router Supports a maxiumum of 5-10 wireless clients. : Consumer-grade (SOHO) wireless router Pushes wireless configuration settings to connected access points. : Wireless controller In reference to cloud computing, what does the term cloud mean? - Correct Answer: It is a metaphor for the internet based on the basic cloud drawing used to represent the telephone network. Cloud resources are implemented in several ways. Match the cloud implementations listed on the left with the appropriate descriptions on the right.
Network Fundamentals Q&A.
What are the main types of cloud services? (Select two.) - Correct Answer: Internal cloud services External cloud services Cloud services can also offer virtual network infrastructures, which include a variety of virtual components. Match each virtual component on the left with the appropriate description on the right. (Each component may be used only once.) - Correct Answer: Uses Ethernet standards to transmit and receive frames on the network. : Virtual network interface Implemented within the hypervisor to monitor and filter traffic on the virtual network as it flows between virtual machines. : Virtual firewall Can be defined within the virtual switch and associated with specific hosts. : Virtual VLAN Can support multiple networks on each of its interfaces, unlike the physical version. : Virtual router Builds a table that identifies which MAC addresses are connected to each of its ports. : Virtual switch Which of the following solutions can help with security when you are implementing an external cloud service? - Correct Answer: VPN The National Institute of Standards and Technology (NIST) has established five characteristics that a true cloud service must have. Match each characteristic to its description. - Correct Answer: Seamlessly increasing and decreasing resources as needed. : Rapid elasticity The service needs to be provided over a network and be available in multiple platforms. : Broad network access Resources can be controlled and optimized automatically. : Measured service On-demand self service users must be able to dynamically obtain resources. : On-demand self service
Network Fundamentals Q&A.
Multiple resources can be used by multiple users and can scale dynamically. : Resource pooling You need to connect several network devices together using twisted pair Ethernet cables. Assuming Auto-MDIX is not enabled on these devices, drag the appropriate type of cabling on the left to each connection type on the right. - Correct Answer: Workstation to switch : Straight-through Ethernet cable router to switch : Straight-through Ethernet cable Workstation to router : Crossover Ethernet Cable switch to switch : Crossover Ethernet Cable router to router : Crossover Ethernet Cable You are deploying a new 10GB Ethernet network using Cat 6 cabling. Which of the following are true concerning this media? (Select two.) - Correct Answer: It supports 10 GB Ethernet connections. PVC insulation surrounds each copper wire. You want to implement an Ethernet network using the 1000BaseT standard using the minimum hardware specifications possible. Which of the following should you include in your plan? (Select two.) - Correct Answer: RJ-45 connectors Cat5e twisted pair cable You have a small network with two switches, SwitchA and SwitchB. MDI-X is not enabled on either switch. Each switch has three client computers connected. IP addresses have been assigned to various devices as follows: WrkA_1, WrkA_2, and WrkA_3 are connected to SwitchA, while WrkB_4, WrkB_5, and WrkB_6 are connected to SwitchB. All of the devices are configured to operate within the same subnet.
Network Fundamentals Q&A.
Which of the following are features of multimode fiber cable? (Select three.) - Correct Answer: Supports only limited distance cable lengths Transfers data through the core using multiple light rays Has a core diameter around 50 to 100 microns Which fiber optic cable requires the exposed fiber tip to be polished as part of the assembly process? - Correct Answer: Field terminated epoxy connectors What is the maximum cable length for UTP Ethernet T implementations? - Correct Answer: 100 meters As specified in the Ethernet standards, what is the maximum number of hosts supported on a single subnet? - Correct Answer: 1024 Which of the following are true about Gigabit Ethernet? (Select two.) - Correct Answer: Can use both copper and fiber optic Uses CSMA/CD What is the backoff on an Ethernet network? - Correct Answer: The random amount of time a device waits before retransmitting after a collision. Which of the following mechanisms are used on Ethernet networks to control access to the transmission medium? (Select two.) - Correct Answer: Backoff Collision detection What is the first thing that happens when a collision occurs on an Ethernet network? - Correct Answer: The device that detected the collision transmits a jam signal.
Network Fundamentals Q&A.
Which of the following is true of CSMA/CD? (Select two.) - Correct Answer: If collisions are detected, an interrupt jam signal is broadcast to stop all transmissions. A device with data to send first listens to the transmission medium to determine if it is free. You administer a network that uses bridges to connect network segments. The network is currently suffering from serious broadcast storms. What can you do to solve the problem? - Correct Answer: Replace the bridges with routers. Which of the following are advantages of using bridges to segment LAN traffic? (Select two.) - Correct Answer: Bridges create separate collision domains. Bridges can link network segments that use different physical media (as long as they have the same architecture). Which two of the following statements accurately describe full-duplex Ethernet? (Select two.) - Correct Answer: It is collision free. It uses direct point-to-point connections between the sender and receiver. Which two of the following statements accurately describe half-duplex Ethernet? (Select two.) - Correct Answer: It uses collision detection and recovery. It sends both signals along the same wire A 5-port hub is attached to interface fa 0/1 on your switch. Users of the workstations attached to the hub are complaining that their pings are erratic. When you run the show interfaces fa 0/1 command, you receive the following output. FastEthernet0/1 is up, line protocol is up (connected)
