Exam 200-301 topic 1 question 89 discussion

Extracted from Book #2, page 359: "... the following list details some of the more common actions that a networking device does that fit into the data plane: - De-encapsulating and re-encapsulating a packet in a data-link frame (routers, layer 3 switches). - Adding or removing an 802.1Q trunking header (routers and switches). - Matching an ethernet frame's destination MAC address to the MAC address table (layer 2 switches). - Matching an IP packet's destination IP address to the IP routing table (routers, layer 3 switches). - Encrypting the data and adding a new IP header (for VPN processing). - Changing the source or destination IP address (for NAT) processing). - Discarding a message due to a filter (ACLs, port security). All the items in the list make up the data plane, because the data plane includes all actions done per message."

ICMP = internet CONTROL message protocol "The role of ICMP is to provide information about the path the data is taking from its point of origin to its destination. It has the same basic structure as an IP packet, but despite that, it's not really goodput. It's there to control 'how things are done', therefore, is part of the control plane."

Both A and D comes under data plane. D : Comparing a destination IP address to an IP routing table falls under the data plane in networking terminology; this is because the data plane is responsible for the actual forwarding of packets based on the information in the routing table, which includes looking up the destination IP address to determine the next hop A: While the control plane would be responsible for determining the routing path for the ICMP echo request, the actual sending and receiving of the echo request and reply happens on the data plane.

The correct answer is: A. reply to an incoming ICMP echo request Explanation: The data plane (also known as the forwarding plane) is responsible for the actual movement of data packets across the network. Actions in the data plane include forwarding packets, filtering packets, and responding to certain protocol requests, such as ICMP echo requests (i.e., ping responses). Here’s a breakdown of why the other options are incorrect: B. Making a configuration change from an incoming NETCONF RPC is a control plane activity. The control plane handles management and control tasks like configuration changes.

A is correct

Think of the control plane as being like the stoplights that operate at the intersections of a city. Meanwhile, the data plane (or the forwarding plane) is more like the cars that drive on the roads, stop at the intersections, and obey the stoplights. I hope this help someone understand better

Correct

D is correct

Data plane layer2= ICMP... Layer3= control plane, IP, routing

control plane runs routing protocols, thus the answer is D

The data plane is accountable for the actual transmission of data packets across a network. It entails determining, based on a packet's destination address, the appropriate outgoing interface for it. This procedure typically involves looking up the destination IP address in the routing table to ascertain the next network hop for the packet. The comparison of the destination IP address with the IP routing table is a crucial data plane operation. Answer: D

It's D

https://ipwithease.com/cisco-express-forwarding-cef/ I think it's a CEF question: FIB and adjacency tables are in data plane, once these are "established" the data won't pass through the cpu any more.

If you can subnet from /20 to /30 and you know the contrast between TCP and UDP, and you learn the data types for the three planes...you WILL pass the CCNA.

Going with D Think of the control plane as being like the stoplights that operate at the intersections of a city. Meanwhile, the data plane (or the forwarding plane) is more like the cars that drive on the roads, stop at the intersections, and obey the stoplights.

Tumbative: I saw this question in a recent Exam, and the RIGHT answer is D, 100% correct in Topic 6 of the Exam.

I’m going with A :)