Computer Networks and Cybersecurity

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What is the primary function of the Physical layer in the OSI model?

Translation of domain names to IP addresses
Routing of packets between networks
Error checking and correction of data
Physical transmission of data between devices (correct)

Which OSI layer is responsible for providing application support?

Session layer
Network layer
Application layer (correct)
Transport layer

What is the main purpose of the OSI model?

To improve network security
To standardize network communication protocols (correct)
To increase network bandwidth
To reduce network latency

Which OSI layer is responsible for routing packets between networks?

Network layer (A) Signup and view all the answers

What is the primary function of the Data Link layer in the OSI model?

Error checking and correction of data (C) Signup and view all the answers

How many layers are there in the OSI model?

7 (C) Signup and view all the answers

Which device operates at the physical layer of the OSI model?

Hub (A) Signup and view all the answers

What is the primary role of a wireless access controller (WAC) in a large-scale Wi-Fi network?

Centralize management, configuration, and security of multiple access points (APs) within a network (B) Signup and view all the answers

What is the purpose of network segmentation using VLANs and access control lists (ACLs) in security best practices?

Enhance network security (B) Signup and view all the answers

What is the main difference between TCP port numbers and UDP port numbers in network protocols?

TCP ports are associated with specific applications or services for reliable communication, UDP ports are used for simpler data exchange without guaranteed delivery (C) Signup and view all the answers

What is the primary function of a router in a network?

Route packets between networks (C) Signup and view all the answers

What is the main function of a switch in a network?

Forward packets at the data link layer of the OSI model (D) Signup and view all the answers

Which layer of the OSI model is responsible for error detection and correction?

Data link layer (D) Signup and view all the answers

What is the main advantage of utilizing a content delivery network (CDN) for web performance optimization?

Distributing static content from geographically dispersed servers (C) Signup and view all the answers

What is the purpose of network forensics in cybersecurity incident response?

Collect and analyze digital evidence from network devices and logs (D) Signup and view all the answers

When using EtherChannel, how are individual links aggregated to appear as a single logical link?

By bundling multiple links together (B) Signup and view all the answers

What is the main difference between IPv4 and IPv6 header fields in addressing schemes?

IPv4 header uses 32-bit addressing, IPv6 header uses 128-bit addressing (D) Signup and view all the answers

Which protocol is commonly used for carrying voice traffic over IP networks?

VoIP (A) Signup and view all the answers