An engineer is designing an IPv6 addressing scheme for a new OT network. The network will have multiple subnets, and the engineer wants to ensure that each subnet has a unique prefix. Which IPv6 address type should be used for local communication within the OT network?

Multicast addresses (ff00::/8), which are used for one-to-many communication.

Unique local addresses (ULA) with a prefix like fc00::/7, which are not globally routable and are suitable for internal networks.

Global unicast addresses (2000::/3), which are routable on the internet and provide global reachability.

Link-local addresses (fe80::/10), which are automatically configured and used only on a single link.

In TCP/IP networking, what is a socket?

A combination of an IP address and a port number

A protocol used for secure file transfer

A type of network cable used for Ethernet connections

A physical hardware connector on a network interface card

What is the primary function of the Domain Name System (DNS)?

To resolve human-readable hostnames to IP addresses

To assign IP addresses to devices automatically

To filter malicious network traffic

A SCADA application on a workstation communicates with a PLC using TCP port 502 (Modbus). The workstation has multiple TCP connections open. How does the workstation distinguish the Modbus connection from other TCP connections?

By the MAC address of the PLC's network interface.

By the combination of the source IP, source port, destination IP, and destination port.

By the source IP address alone, since each workstation has a unique IP.

By the destination port alone, since each application uses a unique port.

EC-CouncilICS/SCADA Cybersecurity

Domain 2Objective 1

Introducing TCP/IP Networks ICSSCADA Practice Questions (Page 4)

Part of the TCP/IP and ICS/SCADA Protocols domain, which makes up ~13% of our current practice bank. EC-Council does not publish an official question count, but from its 120-minute exam (~50–80 total, ~7–10 in this domain), expect 1–2 from this objective — we provide 43 practice questions to prepare you well beyond it. (estimate)

43questions here

9free pages

10concepts

Questions 16–20

16foundation · easy
Which application-layer protocol is commonly used for secure remote command-line access to a device?
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17expert · hard
An engineer is designing an IPv6 addressing scheme for a new OT network. The network will have multiple subnets, and the engineer wants to ensure that each subnet has a unique prefix. Which IPv6 address type should be used for local communication within the OT network?
Select an answer first
18foundation · easy
In TCP/IP networking, what is a socket?
Select an answer first
19foundation · easy
What is the primary function of the Domain Name System (DNS)?
Select an answer first
20application · medium
A SCADA application on a workstation communicates with a PLC using TCP port 502 (Modbus). The workstation has multiple TCP connections open. How does the workstation distinguish the Modbus connection from other TCP connections?
Select an answer first

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