Telecommunications Service Responsibilities

Which protocol is considered to be a reliable communication protocol?

TCP

Which protocol is considered to be an unreliable protocol?

UDP

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

UDP

Which protocol is commonly used for secure web communication?

HTTPS 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?

Transport Layer Signup and view all the answers

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

Transmission Control Protocol (TCP) 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?

Network Layer Signup and view all the answers

Which port is typically used by IMAP?

143 Signup and view all the answers

What is the primary function of a router?

To connect LANs to a WAN Signup and view all the answers

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

Unmanaged switch Signup and view all the answers

What is the function of a firewall?

To protect an internal network from unauthorized access Signup and view all the answers

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

DSL modem Signup and view all the answers

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

ONT Signup and view all the answers

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

Cable modem Signup and view all the answers

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

To connect a computer to an Ethernet or other wired network Signup and view all the answers

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

Application layer Signup and view all the answers

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

SDN is more focused on software-defined functions and interactions Signup and view all the answers

What are the three layers that define an SDN network?

Application layer, Control layer, and Infrastructure layer Signup and view all the answers

Which of the following is a feature of hardware firewalls?

They use stateful packet inspection to block incoming traffic Signup and view all the answers

What is the purpose of PoE standards?

To control how much power is supplied to different types of PDs Signup and view all the answers

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

IEEE 802.3bt (PoE++) Type 4 Signup and view all the answers

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

A PoE injector adds power to the Ethernet cable, while a PoE switch detects connected devices Signup and view all the answers

Which of the following protocols is considered a connectionless protocol?

TFTP Signup and view all the answers

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

Receiving POP3 e-mail Signup and view all the answers

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

67, 68 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?

IMAP Signup and view all the answers