NCTI FINAL EXAM Progression: Field Tech
III - IV Conventional 2024 | Questions and
100% Correct Answers Graded A+
You are running an active browser session with your employer's Human Resources intranet web server. You issue the netstat command from your local workstation's command prompt. The resulting screen shows several connections to the web server, each using a separate transmission control protocol (TCP) port.
Why does your client workstation have multiple active port connections open to the same web server? - Correct Answer - Hypertext transfer protocol (HTTP) sessions often open multiple connections between the client and the server.
Can the "arp" command be used to determine your own media access control (MAC) address? - Correct Answer - No
Which address resolution protocol (ARP) command option shows the contents of the local ARP cache? - Correct Answer - arp -a.
When troubleshooting a network, we begin by performing which of the following?
- Correct Answer - Identify the issue.
How would we verify that TCP/IP is working on the local host? - Correct Answer - Ping the local loopback address. How can we verify that name resolution is working correctly? - Correct Answer - Ping one or more network hosts by both name and address.
Which ping tests would indicate that TCP/IP is working correctly on a network segment? (Choose three) - Correct Answer - Ping the local IP address.
Ping other local segment hosts by IP address.
Ping the local network segment router port.
The Open Systems Interconnection reference model (OSI/RM) Network Layer serves which primary purpose? - Correct Answer - It uses Layer 3 addresses to create multiple routed networks.
The address 68.56.189.17 belongs to which Internet protocol (IP) class? - Correct Answer - Class A
What happens to a datagram sent by a higher level protocol to a 127.x.y.z address? - Correct Answer - The datagram loops back inside the host and never leaves the network interface card (NIC).
Which device evaluates and acts upon a packet's Internet protocol (IP) address? - Correct Answer - Router. The Network Layer must do what to a received frame first, in order to determine the route over which it will forward the datagram to the next network? - Correct Answer - Decapsulate the packet.
What network information can be determined from a logical Internet protocol (IP)
address? - Correct Answer - The host portion and network portion.
The physical address of a device is processed by which layer of the Open Systems Interconnection reference model (OSI/RM)? - Correct Answer - The Physical Layer.
Which layer of the Open Systems Interconnection reference model (OSI/RM) would you suspect as being the problem when packets are arriving at the server but no information is being returned to the client? - Correct Answer - The Data Link Layer.
All computers running on the transmission control protocol/Internet protocol (TCP/IP) suite have which of the following in common? - Correct Answer - Each computer is assigned its own Internet protocol (IP) address.
A repeater operates at which layer of the Open Systems Interconnection reference model (OSI/RM)? - Correct Answer - The Transport Layer. Which Dynamic Host Configuration Protocol (DHCP) network address allocation mechanism assigns a host a temporary IP address? - Correct Answer - Dynamic
Which two choices are examples of trivial file transfer protocol (TFTP) use? (Choose two.) - Correct Answer - Download router upgrades. And
Software upgrades to IP telephones.
How does the Domain Name System (DNS) resolve fully qualified domain names (FQDN) to IP addresses? - Correct Answer - By looking up the names in an address
mapping database.
Which TCP/IP application allows us to transfer files either within a browser or at the command line? - Correct Answer - File transfer protocol (FTP).
Which statement best describes Internet Message Access Protocol (IMAP)? - Correct Answer - IMAP allows users to scan email headers and choose email messages to download from the email server.
To resolve fully qualified domain names (FQDN) to binary IP addresses, resolvers contact which type of TCP/IP application server? - Correct Answer - Domain Name
System (DNS).
Which protocol allows clients to locate and download IP addressing and configuration information on an automatically renewable (lease) basis? - Correct Answer - Dynamic Host Configuration Protocol (DHCP).
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