IT Essentials Chapter 5
What is the correct order of the layers of the TCP/IP model from top to bottom?
Application, transport, internet, network, access.
Which technology is most often used to connect devices to a PAN?
Bluetooth
Which network device allows admins to remotely manage many devices through one dashboard interface ?
Cloud-based network controller
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 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 electromagnetic interference. Which type of network media should be recommend so that the data will not be affected by EMI?
Fiber Optic
Which type of connection to the internet is capable of the fastest transfer rates ?
Fiber
Which two types of signal interference are reduced more by STP than by UTP?
RFI and EMI
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
Which well known port number is used by the DHCP 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
Which device provides wireless connectivity to users as its primary function?
Access point
Which two devices are commonly powered by PoE?
Access point and IP phone
Which type of server would support the SMTP, POP and IMAP protocols ?
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
Which pairs of wires change termination order between the 568A and 568B standards ?
Green and Orange
A client package is received by a server. The packet has a destination port number of 143. What service application is the client requesting ?
IMAP
A tech 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 TV signals.
A tech 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 configure for VLANs and port security.
What is a characteristic of a WAN?
It connects multiple networks that are geographically separated.
A tech 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 info.
A tech 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 tech 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 admin to manage many remote networking devices from a central location.
A tech 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 tech 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 tech 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 tech is searching through a storage locker and finds a UTM. What is the purpose of this device ?
It is an all in one security appliance that includes IDS/IPS functionally as well as stateful firewall service.
A tech 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 tech is searching through a storage locker and finds a Firewall. What is the purpose of this device ?
It is placed between 2 or more networks and protects data and equipment from unauthorized access.
A tech is searching through a storage locker and finds a Patch panel . What is the purpose of this device ?
It provides wired or wireless connection between end devices, switches and routers.
A tech 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
Which internet connection type is an always-on service that uses radio signal sent from a tower to a receiver in a home or business?
Line of sight wireless
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
Which device acts as a termination point for cable runs and keeps cables secure and safely out of walkways?
Patch Panel
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
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 3 devices are usually integrated into a multipurpose network device?
Switch, Router and wireless access point
Which type of server would be used to keep a historical record of messages from monitored network devices?
Syslog
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
A tech with a PC is using multiple apps while connected to the internet. How is the PC able to keep track of the data flow between multiple app sessions and have each app receive the correct packet flows?
The data flow is being tracked based on the source port number that is used by each app.
What is a feature of the 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
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's connected to a switch
Which smart home wireless technology has an open standard that allows up to 232 devices to be connected ?
Z-Wave
