Chapter 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 5 GHz and 2.4 GHz ranges?
802.11n
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 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 client packet is received by a server. The packet has a destination port number of 23. What service application is the client requesting?
Telnet
Which two devices are commonly powered by PoE?
access point, IP phone
Which type of connection to the Internet is capable of the fastest transfer rates?
fiber
A technician is searching through a storage locker and finds a wireless NIC. What is the purpose of this device?
t is needed to connect a computer or smart device to an 802.11 network.
What is a feature of a dial-up connection?
the use of an analog modem to transmit data over voice telephone lines
What is a common function of a proxy server?
to store frequently accessed web pages on the internal network
When would a printer be considered a network host?
when it is connected to a switch
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 device 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 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 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 Cisco ASA 5505-X (UTM). What is the purpose of this device?
It is an all-in-one security appliance that includes IDS/IPS functionality as well as stateful firewall services.
A technician is searching through a storage locker and finds an Ethernet NIC. What is the purpose of this device?
It is needed to connect a computer to a wired local-area network.
A technician is searching through a storage locker and finds a firewall. What is the purpose of this device?
It is placed between two or more networks and protects data and equipment from unauthorized access.
A technician is searching through a storage locker and finds a repeater. What is the purpose of this device?
It is used to regenerate weak signals to extend the distance a signal can travel.
A technician is searching through a storage locker and finds a patch panel. What is the purpose of this device?
It provides a wired or wireless connection between end devices, switches, and routers and in some cases, can regenerate weak signals.
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 two types of signal interference are reduced more by STP than by UTP?
RFI, EMI
What type of connector is used to connect an analog modem to a telephone line socket?
RJ-11
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 application sessions and have each application receive the correct packet flows?
The data flow is being tracked based on the source port number that is used by each application.
Which network device would be the most appropriate to provide stateful packet filtering, email filtering, and VPN services?
UTM
Which smart home wireless technology has an open standard that allows up to 232 devices to be connected?
Z-Wave
Which device provides wireless connectivity to users as its primary function?
access point
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?
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
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 device acts as a termination point for cable runs and keeps cables secure and safely out of walkways?
patch panel
Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?
switch
A customer is considering a multipurpose device to create a home network. Which three devices are usually integrated into a multipurpose network device?
switch, router, wireless access point
Which type of server would be used to keep a historical record of messages from monitored network devices?
syslog
