Telecoms

Which type of diagram shows logical connections between devices, such as routing and subnets?

• Physical Diagram
• Logical Diagram
• Wireless AP Placement Diagram
• Server Connectivity Diagram

Answer explanation

Logical diagrams represent logical connections like routing and subnets.

In a network design diagram, what does a dashed line typically represent?

• Physical cabling
• Wireless connection
• Logical connection
• Power supply

Answer explanation

Dashed lines in diagrams often signify logical connections.

What is the subnet mask for a network with 256 IP addresses?

• 255.255.255.0
• 255.255.254.0
• 255.255.252.0
• 255.255.255.128

Answer explanation

A subnet mask of 255.255.255.0 allows for exactly 256 IP addresses in a network.

Which of the following is a valid private IP address?

• 192.168.1.1
• 172.32.0.1
• 10.0.-1.-1
• 8.8.8.8

Answer explanation

Private IP addresses include ranges like 192.168.x.x, making option 1 correct here.

How many usable host IPs are available in a /29 subnet?

• 2
• 6
• 14
• 62

Answer explanation

A /29 subnet provides six usable host IPs after accounting for network and broadcast addresses.

At which OSI layer does a switch operate?

• Layer 1 (Physical)
• Layer 2 (Data Link)
• Layer 3 (Network)
• Layer 4 (Transport)

Answer explanation

Switches operate at Layer 2, handling MAC addresses and frame forwarding within LANs.

Which layer is responsible for end-to-end communication and error checking?

• Transport Layer (Layer 4)
• Network Layer (Layer 3)
• Data Link Layer (Layer 2)
• Application Layer (Layer 7)

Answer explanation

The Transport Layer ensures reliable delivery and error checking for end-to-end communication between devices on a network.

What protocol operates at the Application layer of the OSI model?

• TCP/IP
• HTTP/HTTPS
• Ethernet II
• ICMP

Answer explanation

HTTP/HTTPS are protocols that operate at the Application layer of the OSI model, enabling web communication between clients and servers.

What is the primary function of a VLAN?

• Increase collision domains
• Logically group devices for better traffic segmentation
• Extend wireless coverage
• Reduce physical cabling requirements

Answer explanation

Explanation: VLANs logically segment networks for better traffic management.

Which layer is responsible for end-to-end communication and error checking?

• Transport Layer (Layer 4)
• Network Layer (Layer 3)
• Data Link Layer (Layer 2)
• Application Layer (Layer 7)

Answer explanation

The transport layer ensures reliable delivery and error checking.