IT Essentials 7.0 Chapter 5.2

Which two protocols operate at the transport layer of the TCP/IP model? (Choose two.)

• TCP

• UDP

• IP

• ICMP

• FTP

A technician has captured packets on a network that has been running slowly when accessing the internet. Which port number should the technician look for within the captured material to locate HTTP packets?

• 20

• 21

• 53

• 80

• 110

Which three Wi-Fi standards operate in the 2.4GHz range of frequencies? (Choose three.)

• 802.11a

• 802.11b

• 802.11g

• 802.11n

• 802.11ac

Which smart home technology requires the use of a device, known as a coordinator, to create a wireless PAN?

• 802.11ac

• 802.11n

• Z-Wave

• Zigbee

Which network service automatically assigns IP addresses to devices on the network?

• DHCP

• Telnet

• DNS

• traceroute

How many devices can a Bluetooth device connect to simultaneously?

• 127

• 7

• 10

• 24

• 5

What is a common function of a proxy server?

• to store frequently accessed web pages on the internal network

• to control who is permitted to access the internal network

• to detect malicious signatures by monitoring traffic that is entering the internal network

• to provide access to a shared pool of configurable computing resources

What is the correct order of the layers of the TCP/IP model from the top layer to the bottom?

• application, session, network, data link, physical

• application, internet, network access, transport

• network access, transport, internet, application

• application, transport, internet, network access

Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges?

• 802.11n

• 802.11g

• 802.11b

• 802.11a

Which well-known port number is used by the DHCP (client) protocol?

• 67

• 68

• 20

• 80

• 53