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Which of the following network components is PRIMARILY set up to serve as a security measure by preventing una

Which of the following network components is PRIMARILY set up to serve as a security measure
by preventing unauthorized traffic between different segments of the network?

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A.
Firewalls

B.
Routers

C.
Layer 2 switches

D.
VLANs

Explanation:

Firewall systems are the primary tool that enable an organization to prevent unauthorized access
between networks. An organization may choose to deploy one or more systems that function as
firewalls. Routers can filter packets based on parameters, such as source address, but are not
primarily a security tool. Based on Media Access Control (MAC) addresses, layer 2 switches
separate traffic in a port as different segments and without determining if it is authorized or
unauthorized traffic. A virtual LAN (VLAN) is a functionality of some switches that allows them to
switch the traffic between different ports as if they are in the same LAN. Nevertheless, they do not
deal with authorized vs. unauthorized traffic.


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