Module 6 netacad

After a router receives a Layer 2 frame, what does it do next?

• It de-encapsulates the frame to access the Layer 3 packet, determines the next hop, and encapsulates the packet into a new Layer 2 frame on the outgoing interface.

• It forwards the frame based on the destination MAC address without examining Layer 3 information.

• It modifies the destination IP address and forwards the original frame unchanged.

• It replaces only the source MAC address and forwards the same frame out all interfaces.

Which statement describes a mesh physical topology?

• Every node is cabled directly to every other node, providing high availability.

• All nodes share a single backbone cable with terminators at each end.

• Each node connects to exactly two others to form a closed loop.

• All nodes are connected to a single central device by individual links.

Although CSMA/CD is a feature of Ethernet, why is it typically no longer necessary on modern networks?

• Full-duplex operation on switched links prevents collisions.

• Routers automatically filter all collision domains by default.

• Wireless access points eliminate the need for collision detection on wired links.

• Hubs use token passing to avoid collisions.

Which type of physical topology can be created by connecting all Ethernet cables to a central device?

• Star

• Bus

• Ring

• Mesh

Which method is used to manage contention-based access on a wireless network?

• CSMA/CA

• Token passing

• Polling by a master device

• CSMA/CD

Which statement describes an advantage of a mesh topology over a star topology?

• It provides higher availability because each node is directly connected to every other node.

• It reduces cabling by using a single backbone cable for all nodes.

• It simplifies troubleshooting because all traffic passes through a single hub.

• It ensures deterministic access to the network medium using tokens.

Which identifier is used at the data link layer to uniquely identify an Ethernet device?

• MAC address

• IP address

• Port number

• TCP/UDP socket

Which organization is responsible for developing open standards and protocols that apply to the data link layer (such as IEEE 802)?

• Institute of Electrical and Electronics Engineers (IEEE)

• Internet Engineering Task Force (IETF)

• International Telecommunication Union (ITU-T)

• Internet Assigned Numbers Authority (IANA)

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

• Data link

• Physical

• Network

• Transport

What is a function of the Logical Link Control (LLC) sublayer?

• It identifies the Layer 3 protocol and allows multiple network layer protocols to share the same media.

• It provides data link addressing and implements CSMA/CD.

• It determines the best path through the network using routing metrics.

• It converts frames to bits for transmission on the medium.