Networking Flashcards
An incorrect firewall setting results in port 110 being blocked. Which of the following services will not work until the port is unblocked?
Secure web pages
Receiving POP3 e-mail
Remote desktop
Receiving POP3 e-mail
The default port used by POP3 to receive e-mail is 110
A computer that uses automatic IP addressing relies on which of the following ports?
25
143
67, 68
67, 68
The ports used by the DHCP service for automatic IP addressing are 67 and 68
All information is transmitted over the Internet in which of the following?
Frame
Archive
Packet
Packet
All Internet traffic is broken into packets that are reassembled at the destination
Sometimes, for greater security, e-mail providers change the default ports used for sending and receiving e-mail. If an e-mail provider changes from port 143 to a different port, which of these services would need to be configured to use the new port?
POP3
SMTP
IMAP
IMAP
IMAP normally uses port 143
A user reports that she can connect to normal websites (HTTP://), but not to secure websites (HTTPS://). Which port is being blocked by a firewall?
80
445
443
443
443 is the port used for HTTPS (secure HTTP)
Company A wants to create two separate networks in a building but only wants to use a single point of connection. Which of the following does the company need?
Unmanaged switch
Hub
Managed switch
Managed switch
A managed switch can be used to create multiple networks
To avoid the expense of adding network cable or the uncertainty of wireless signals in a building with brick walls, which of the following would you use to add a network connection?
Router
PoE
EoP
EoP
Ethernet over Power (EoP) sends Ethernet signals over power lines in a building
Company B has just moved into a new building and has found an existing Internet connection that use RG-6 wiring. Which of the following is being used?
Cable
DSL
Router
Cable
RG-6 is a type of wiring used for cable Internet and cable TV
Your client is a company that has two locations in the same city, both of which locations get their Internet service from the same provider in the same city. Both locations use the same type of service, but one location has service that is about three to five times faster than the other. What type of service is most likely being used?
Satellite
DSL
PoE
DSL
DSL service varies widely in speed because its speed is dependent upon the distance from a client site to the central switch (central office) used by the phone company; longer distances have slower connections
What feature of all network adapters can be used to determine which device a frame is sent from or going to?
IP address
MAC address
Switch port
MAC address
Every network adapter, including those built into other devices, has a unique 48-bit MAC address
Company C is setting up its own wireless network instead of using a contractor. Which of the following does the company need to configure to provide IP addresses automatically?
TKIP
WEP
DHCP
DHCP
DHCP supplies IP addresses to connected devices
The term Internet of Things (IoT) applies to a wide variety of devices. Which of the following categories is not considered an IoT category?
Streaming video playback
Lighting
Security
Streaming video playback
Streaming video playback is a function of complex devices such as smart TVs; IoT devices are used to perform low-power and simple tasks
Company D is setting up a web server on its network. Which of the following router settings will enable the company to safely host the web server while protecting other devices with the router’s built-in firewall?
NAT
Port forwarding
QoS
Port forwarding
Port forwarding enables inbound connections of a particular type (such as web page requests on HTTP port 80) to be routed to a particular device
A wireless network that is using the old WEP encryption standard because of legacy equipment on the network has a lot of unauthorized use. Until the network can be upgraded to use WPA2-compliant devices, the client wants to allow only authorized devices to use the network by checking their MAC addresses. Which of the following describes what the client wants to create?
Blacklist
Red flag list
Whitelist
Whitelist
A whitelist allows only devices with listed MAC addresses to use the network
Your client is confused about how the devices on a network that connects to the Internet receive their IP addresses. Which of the following router functions do you need to explain to help the client understand this process?
DNS
Blacklist
DHCP
DHCP
DHCP is the router function that provides IP addresses to connected devices
Company E is replacing its aged 802.11g wireless network with newer hardware. Which of the following would provide the fastest speed and also support older devices?
- 11a
- 11ac
- 11n
- 11ac
802. 11ac is the fastest wireless standard in use and is also backward compatible with older hardware
Company F is installing Bluetooth mice and keyboards in its meeting room, which is about 8 meters from front to back. The computer will be at the back of the room. Which Bluetooth standard is the minimum needed to have the range necessary?
Bluetooth Class 2
Bluetooth Class 1
Bluetooth 4.2
Bluetooth Class 2
Bluetooth Class 2 devices have a maximum range of up to 10 meters
Company G is having a huge problem with theft in its warehouse. Which of the following technologies does it need to implement to track inventory and help prevent theft?
NFC
Z-Wave
RFID
RFID
RFID chips on merchandise and scanners at entrances, exits, and restrooms will help reduce theft
Your client wants to use multiple devices that can relay radio signals to and from each other as part of their smart home. What is this category of technology called?
Hotspot
Bluetooth
Mesh
Mesh
A mesh network uses multiple devices that can wirelessly connect directly with each other. Several smart home technologies use mesh networking, including Zigbee and Z-Wave, among others
A co-worker wants to use a smartphone to make payments instead of digging through a wallet or purse for a credit card. What feature needs to be enabled?
NFC
Z-Wave
Wi-Fi
NFC
Near field communication (NFC) is used for cardless payment systems such as Apple Pay or Google Pay
Microsoft IIS and Apache are examples of which type of server?
DHCP server
File server
Web server
Web server
These are examples of web servers.
Company H is setting up a RADIUS server as part of its wireless network. This server will perform which of the following tasks?
Mail server
Authentication server
Proxy server
Authentication server
A RADIUS server is used for authentication on a WPA or WPA2 Wi-Fi enterprise network
Company J wants to install an Internet appliance that will provide protection as well as load balancing and VPN services. Which of the following categories has the device they need?
DLP
IDS
UTM
UTM
UTM is unified threat management, which includes broad protection against threats and bundles network security services
Your client’s network is able to receive mail but unable to send it. Which of the following is not working?
SMTP
UTM
DNS server
SMTP
SMTP (Simple Mail Transfer Protocol) is used to send e-mail messages. If this protocol is disabled or blocked, e-mail cannot be sent
Your department is considering an Internet appliance. Which of the following is the most likely reason to get one?
Print serving
Security
Wireless AP
Security
Internet appliances are used to provide additional security features to an Internet connection
A user cannot connect to the Internet. When you ask her for her current IP address, she tells you it is 169.254.0.18. Which of the following is not working?
APIPA
Static IP
DHCP
DHCP
A 169.254.x.x address is generated when the DHCP server cannot be reached
You are reconfiguring up a system using IPv4 and a static IP address after its original settings were deleted. The subnet mask was recorded using the CIDR shorthand of /24. Which of the following decimal subnet masks should you enter when entering the IPv4 address?
- 255.255.0
- 168.1.1
- 255.0.0
255.255.255.0
/24 is the CIDR shortcut for 255.255.255.0
Company K has a sales force that typically uses insecure hotel and coffee-shop wireless networks. Which of the following should you advice they start using to enhance security?
VLAN
VPN
NAT
VPN
A VPN is a virtual private network, which creates a secure “tunnel” for carrying network traffic through insecure connections
A DHCP-provided IP address that never changes is known as which of the following?
IP permanency
IP reservation
Link-local
IP reservation
An IP reservation is an address set up by a DHCP server that doesn’t change
Your client wants to buy a single switch to create three separate wired networks. What type of networks does the client want to create?
VPN
Link-local
VLAN
VLAN
A VLAN is a group of ports on a managed switch that performs as if it’s on a separate network from other ports on the switch
You are working with a client who needs Internet access but lives too far away from the city to use DSL or cable TV. They live on top of a hill. They need quick response and expect to use 15 GB or more of data per month. Which of the following Internet services would you recommend investigating?
Cellular
FTTP
Line-of-sight fixed wireless
Line-of-sight fixed wireless
Line-of-sight fixed wireless, if available, is the best choice because it has no data caps and, unlike satellite, has quick response (fast ping rate)
Your client has an old laptop with an RJ-11 port and an RJ-45 port built in. It does not have wireless capabilities. Without buying or renting another component, which of the following Internet connection types is this laptop ready to use?
DSL
Dial-up
Cable
Dial-up
The RJ-11 port indicates the laptop has a dial-up modem. Dial-up requires no additional equipment, only an account with a dial-up ISP
You are at a client’s location preparing to install an update to Windows. Their Internet connection goes down. Which of the following is the best choice to use to install the update immediately?
DSL
Dial-up
Mobile hotspot/tethering
Mobile hotspot/tethering
The mobile hotspot/tethering option supported by many smartphones would enable you to perform the update on-site
Your client wants to build a network that will connect locations in various parts of a medium-sized city with each other. Which type of network does the client want to create?
MAN
WAN
LAN
MAN
A metropolitan area network (MAN) connects locations in a single city that might be separated by some blocks of distance
Your company is considering upgrading its DSL service to a faster service. Which of the following types of services is likely to be the fastest?
Cable
FTTN
FTTP
FTTP
Fiber to the premises (FTTP) will be the fastest, since the fiber is connecting directly to the home or office
Your client is reporting problems with some of their network cables. Unfortunately, none of the cables are labeled and the client’s wiring closet is a mess. Which of the following should you use to help label the client’s cables?
Multimeter
Tone generator and probe
Crimper
Tone generator and probe
A tone generator and probe helps determine which wire is which.
After labeling the cables for your client, you discover that one of the cables is connected to a workstation that can’t connect to the Internet. To help determine if the problem is actually the NIC, which of the following would you use?
Loopback plug
Multimeter
Cable tester
Loopback plug
A loopback plug is attached to the NIC’s RJ-45 cable port and it loops transmit lines back to receive lines. If the same data is received as sent, the NIC port works. If not, the NIC needs repair or replacement
Your client’s 2.4-GHz network once ran very quickly. However, several new houses have been built nearby and network performance is now very poor. Which of the following would help determine if different settings are needed?
Mobile hotspot
Cable tester
Wi-Fi analyzer
Wi-Fi analyzer
A Wi-Fi analyzer displays the activity on the 2.4-GHz band by channel and router name
You are preparing to build some network patch cables for a Gigabit Ethernet network. Which of the following do you not need to use for this task?
Punchdown block
RJ-45 crimper
Wire stripper
Punchdown block
A punchdown block is not used for patch cables. It is used for cables wired into a wall
After an office remodeling project, some segments of your client’s wired network are slow. The exiting computers, switches, and routers were retained, but additional patch panels were installed. What might have gone wrong during the process? (Choose two.)
Incorrect Cat level in patch panels
Loopback plugs left connected to some workstations
Incorrect Cat level in patch cables
Hub used on some network segments
Incorrect Cat level in patch panels
Incorrect Cat level in patch cables
Using patch cables or punchdown blocks with Cat levels lower than the previous network hardware could slow down the network; for example, using Cat 5 (100 Mbps) instead of Cat 5e (1000 Mbps) hardware
