IT Essentials Potential Exam Review CHP 5
Which well-known port number is used by the DHCP (client) protocol?
68
How many devices can a Bluetooth device connect to simultaneously?
7
Which IEEE standard operates at wireless frequencies in both the 5GHz and 2.4GHz ranges?
802.11n
Which type of connection to the Internet is capable of the fastest transfer rates?
Fiber
A network specialist has been hired to install a network in a company that assembles airplane engines. Because of the nature of the business, the area is highly affected by electromagnetic interference. Which type of network media should be recommended so that the data communication will not be affected by EMI?
Fiber Optic
Which pairs of wires change termination order between the 568A and 568B standards?
Green and Orange
A client packet is received by a server. The packet has a destination port number of 143. What service application is the client requesting?
IMAP
A technician is searching through a storage locker and finds a cable modem. What is the purpose of this device?
It connects a home or business network to a company that provides internet connectivity as well as television signals.
A technician is searching through a storage locker and finds a managed switch. What is the purpose of this device?
It connects multiple end devices and can be configured for VLANs and port security.
A technician is searching through a storage locker and finds a PoE injector. What is the purpose of this device?
It is a device that can be inserted in the middle of a cable run to add power.
A client packet is received by a server. The packet has a destination port number of 161. What service application is the client requesting?
SNMP
A client packet is received by a server. The packet has a destination port number of 22. What service application is the client requesting?
SSH
A customer is considering a multipurpose device to create a home network. Which devices are usually integrated into a multipurpose network device?
Switch, Router, wireless access poin
Which network device makes forwarding decisions based on the destinations MAC address that is contained in the frame?
Swtich
A client packet is received by a server. The packet has a destination port number 23. What service application is the client requesting?
Telnet
Which device provides wireless connectivity to users as its primary function?
Access Point
Which devices are commonly powered by PoE?
Access point, IP phone
Which technology is most often used to connect devices to a PAN?
Bluetooth
A client packet is received by a server. The packet has a destination port number of 53. What service application is the client requesting?
DNS
A user needs to access the Internet from home. Which devices is needed if a user connects to an ISP through the telephone network?
DSL modem
A client packet is received by a server. The packet has a destination port number of 21. What service application is the client requesting?
FTP
What is a characteristic of a WAN?
It connects multiple networks that are geographically separated.
A technician is searching through a storage locker and finds a router. What is the purpose of this device?
It connects networks and forwards traffic to remote networks by using IP addressing information.
A technician is searching through a storage locker and finds a DSL modem. What is the purpose of this device?
It connects the network of a user to the digital infrastructure of a phone company, providing always-on service.
A technician is searching through a storage locker and finds a cloud-based network controller. What is the purpose of this device?
It is a device that allows a network administrator to manage many remote networking devices from a central location.
A technician is searching through a storage locker and finds a Powerline networking connector. What is the purpose of this device?
It is a device that uses existing electrical wiring to connect devices and sends data using specific frequencies.
A technician is searching through a storage locker and finds an unmanaged switch. What is the purpose of this device?
It is a device whose sole purpose is to connect end devices and to microsegment a LAN.
A technician is searching through a storage locker and finds a firewall. What is the purpose of this device?
It is places between two or more networks and protects data and equipment from unauthorized access.
A technician is searching through a storage locker and finds an access point. What is the purpose of this device?
It uses radio waves to provide network access to wireless devices.
A client packet is received by a server. The packet has a destination port number of 389. What service application is the client requesting?
LDAP
A client packet is received by a server. The packet has a destination port number of 137. What service application is the client requesting?
NetBIOS (NetBT)
Which types of signal interference are reduced more by STP than by UTP?
RFI, EMI
A client packet is received by a server. The packet has a destination port number of 25. What service application is the client requesting?
SMTP
A technician with a PC is using multiple applications while connected to the Internet. How is the PC able to keep track of the data flow between multiple applications sessions and have each application receive the correct packet flows?
The data flow is being tracked bases on the source port number that is used by each application
What is a common function of a proxy server?
To store frequently accessed web pages on the internal network
Which network device would be the most appropriate to provide stateful packet filtering, email filtering, and VPN services?
UTM
When would a printer be considered a network host?
When it is connected to a switch
Which smart home wireless technology has an open standard that allows up to 232 devices to be connected?
Z-Wave
What is the correct order of the layers of the TCP/IP model from the top layer to the bottom?
application, transport, internet, network access
Which network device allows administrators to remotely manage many devices through one dashboard interface?
cloud-based network controller
Which type of server would support the SMTP, POP, and IMAP protocols?
Which internet connection type is an always-on service that uses radio signals sent from a tower to a receiver in a home or business?
line of sight wireless
Which type of server would be used to keep a historical record of messages from monitored network devices?
syslog
