The Network Layer Flashcards
Q: What does the Network Layer (Layer 3) in OSI control?
A: The Network Layer controls the exchange of data packets and their routing between nodes on a network.
Q: What are the main functions of the Network Layer?
A: Network Layer - Manages packet routing through logical addressing (IP addresses).
Q: What protocols are commonly used at the Network Layer?
A: IPv4, IPv6, IPsec, ICMP, IGMP, RIP, and OSPF are commonly used protocols at the Network Layer.
Q: How does the Network Layer ensure data reaches its destination?
A: It routes data packets based on addresses and constructs routing tables to guide packets through the network.
Q: What is the role of routers in the Network Layer?
A: Routers facilitate communication between different subnets by forwarding packets along the optimal paths to their destinations.
Q: What is IPv4?
A: Internet Protocol version 4, the primary protocol used for sending data packets over the Internet, characterized by its 32-bit address format.
Q: What is IPv6?
A: Internet Protocol version 6, designed as the successor to IPv4, featuring a 128-bit address format to accommodate the growing number of devices connected to the Internet.
Q: What is IPsec?
A: Internet Protocol Security, a suite of protocols used to secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet.
Q: What is ICMP?
A: Internet Control Message Protocol, used by network devices to send error messages and operational information, such as network congestion notifications.
Q: What is IGMP?
A: Internet Group Management Protocol, used by IP hosts and adjacent routers to manage multicast group memberships.
Q: What is RIP?
A: Routing Information Protocol, a dynamic routing protocol that uses hop count as a metric to determine the best route to a destination.
Q: What is OSPF?
A: Open Shortest Path First, a link-state routing protocol used for efficient routing of IP packets within a single autonomous system (AS), based on shortest path algorithms.
