What is the purpose of the Frame Check Sequence (FCS) field in an Ethernet frame?

To detect errors that may have occurred during transmission

To identify the upper-layer protocol carried in the payload

To specify the length of the Ethernet frame

To provide the source and destination addresses

A company has two departments, Sales and Engineering, sharing a single 24-port switch. The administrator wants to prevent broadcast traffic from Sales reaching Engineering hosts while keeping the existing physical cabling. What is the most efficient configuration?

Create two VLANs and assign each port to the appropriate VLAN based on the connected department.

Replace the switch with two separate physical switches, one for each department.

Configure port security to limit the number of MAC addresses per port.

Enable spanning tree protocol on the switch.

A company has a single switch with hosts in VLAN 10 and VLAN 20. A host in VLAN 10 sends an ARP request. Which hosts receive the ARP request?

No hosts, because ARP requests are dropped by the switch.

Only the host with the matching IP address.

Hosts in both VLAN 10 and VLAN 20.

What is the primary purpose of a VLAN on an Ethernet switch?

To segment a LAN into multiple broadcast domains

To provide redundancy for the network

To increase the speed of the physical links

To replace the need for IP addressing

Juniper NetworksCertified Associate, Junos

Domain 1Objective 3

Ethernet Networking JN0-105 Practice Questions (Page 4)

Part of the Networking Fundamentals domain, which makes up ~24% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 1–1 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

6concepts

Questions 16–20

16foundation · easy
What is the purpose of the Frame Check Sequence (FCS) field in an Ethernet frame?
Select an answer first
17application · medium
A company has two departments, Sales and Engineering, sharing a single 24-port switch. The administrator wants to prevent broadcast traffic from Sales reaching Engineering hosts while keeping the existing physical cabling. What is the most efficient configuration?
Select an answer first
18application · medium
A company has a single switch with hosts in VLAN 10 and VLAN 20. A host in VLAN 10 sends an ARP request. Which hosts receive the ARP request?
Select an answer first
19foundation · easy
Which field in an Ethernet frame is used by the receiving device to determine whether the frame is addressed to it?
Select an answer first
20foundation · easy
What is the primary purpose of a VLAN on an Ethernet switch?
Select an answer first

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