1. Question 1

Role of a proxy server?

• ❌ To encrypt and decrypt data for secure transmission

• ❌ To manage network traffic and connect different networks

• ❌ To control incoming and outgoing network traffic

• ✅ To forward requests from clients to the appropriate server while hiding IP addresses

Explanation:
A proxy hides client identities and forwards their requests, improving privacy and control.

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2. Question 2

What does Wi-Fi 6 use for performance improvement?

• ❌ TDMA

• ❌ FHSS

• ❌ CDMA

• ✅ OFDMA

Explanation:
OFDMA allows multiple simultaneous transmissions, boosting network efficiency.

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3. Question 3

What does “/24” mean in IPv4?

• ❌ Range of IPs

• ✅ First 24 bits are used for the network portion

• ❌ Default gateway

• ❌ Subnet mask 255.255.0.0

Explanation:
/24 corresponds to subnet mask 255.255.255.0, meaning 24 bits for network, 8 for hosts.

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4. Question 4

Role of a subnet mask?

• ❌ Define range of IPs

• ✅ Divide an IP address into network and host portions

• ❌ Encrypt IP

• ❌ Determine default gateway

Explanation:
Subnet masks help split an IP into network and host sections, enabling subnetting.

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5. Question 5

What does the ARP table store?

• ❌ Routes to all destinations

• ❌ Default gateway only

• ❌ All IPs + DNS

• ✅ MAC addresses of locally connected devices

Explanation:
ARP maps IP → MAC for devices on the same network.

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6. Question 6

Which IPv6 addressing schema sends data one-to-one?

• ✅ Unicast

• ❌ Anycast

• ❌ Broadcast

• ❌ Multicast

Explanation:
Unicast = one sender to one receiver (point-to-point).

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7. Question 7

What does ARP do when sending to a location outside the broadcast domain?

• ✅ ARP sends the message to the MAC address of the default gateway.

• ❌ Asks destination IP for MAC

• ❌ Drops the packet

• ❌ Looks up destination directly in ARP table

Explanation:
Traffic going outside the local network must be sent to the default gateway’s MAC address.

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🧾 Summary Table

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