Telecommunications Service Responsibilities

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Questions and Answers

Which protocol is considered to be a reliable communication protocol?

  • UDP
  • SSH
  • TCP (correct)
  • HTTPS

Which protocol is considered to be an unreliable protocol?

  • HTTPS
  • UDP (correct)
  • SSH
  • TCP

Which protocol is often used for Voice over IP (VoIP) calls or video chats?

  • UDP (correct)
  • TCP
  • HTTPS
  • SSH

Which protocol is commonly used for secure web communication?

<p>HTTPS (B)</p> Signup and view all the answers

Which layer of the network reference model is responsible for handling data transfer details such as packing and unpacking data into protocol-specific packet formats?

<p>Transport Layer (A)</p> Signup and view all the answers

Which protocol is a primary data transfer protocol of any TCP/IP network?

<p>Transmission Control Protocol (TCP) (D)</p> Signup and view all the answers

Which layer of the TCP/IP suite is a stack of protocols and services that individually manage, package, transmit, and operate networks large and small?

<p>Network Layer (B)</p> Signup and view all the answers

Which port is typically used by IMAP?

<p>143 (C)</p> Signup and view all the answers

What is the primary function of a router?

<p>To connect LANs to a WAN (D)</p> Signup and view all the answers

What type of switch is sold for small office/home office (SOHO) use?

<p>Unmanaged switch (A)</p> Signup and view all the answers

What is the function of a firewall?

<p>To protect an internal network from unauthorized access (C)</p> Signup and view all the answers

Which type of modem connects to a standard RJ-11 telephone line?

<p>DSL modem (B)</p> Signup and view all the answers

What type of device converts light signaling into electrical impulses in a fiber optic service?

<p>ONT (B)</p> Signup and view all the answers

Which type of modem uses regular RG-6 or RG-59 cable TV lines to provide internet connectivity?

<p>Cable modem (C)</p> Signup and view all the answers

What is the purpose of a network interface card (NIC)?

<p>To connect a computer to an Ethernet or other wired network (B)</p> Signup and view all the answers

Which layer of an SDN network contains hardware or software edge devices?

<p>Application layer (A)</p> Signup and view all the answers

What is the main difference between SDN and traditional hardware-based network management?

<p>SDN is more focused on software-defined functions and interactions (A)</p> Signup and view all the answers

What are the three layers that define an SDN network?

<p>Application layer, Control layer, and Infrastructure layer (A)</p> Signup and view all the answers

Which of the following is a feature of hardware firewalls?

<p>They use stateful packet inspection to block incoming traffic (B)</p> Signup and view all the answers

What is the purpose of PoE standards?

<p>To control how much power is supplied to different types of PDs (B)</p> Signup and view all the answers

Which PoE standard supports a maximum power output of 100 watts on each port of a PSE?

<p>IEEE 802.3bt (PoE++) Type 4 (B)</p> Signup and view all the answers

What is the difference between a PoE injector and a PoE switch?

<p>A PoE injector adds power to the Ethernet cable, while a PoE switch detects connected devices (A)</p> Signup and view all the answers

Which of the following protocols is considered a connectionless protocol?

<p>TFTP (A)</p> Signup and view all the answers

Which of the following services will not work until port 110 is unblocked?

<p>Receiving POP3 e-mail (B)</p> Signup and view all the answers

A computer that uses automatic IP addressing relies on which of the following ports?

<p>67, 68 (D)</p> Signup and view all the answers

If an e-mail provider changes from port 143 to a different port, which of these services would need to be configured to use the new port?

<p>IMAP (E)</p> Signup and view all the answers

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