LBC90805 wrote: Does this question imply that the Ethernet Frames will be stripped and re-encapsulated between the routers? Thus the only PDU that arrives at PC2 from PC1 is the Packet and not the frame since the frame has been altered X amount of times making hopes between routers?
LBC90805 wrote: I'm confused by a question in Cisco's CCENT/CCNA ICND1 Official Exam Certification Guide. In chapter 5 at the beginning of the chapter there are several questions. Question 2. Imagine that PC1 needs to send some datat to PC2, and PC1 and PC2 are separated by several routers. What are the largest entities that make it from PC1 to PC2. a. Frame b. Segment c. Packet d. L5 PDU e. L3 PDU f. L1 PDU. Correct answer c and e. Don't PCs encapsulate Packets into Frames before sending them to their default gateways? Does this question imply that the Ethernet Frames will be stripped and re-encapsulated between the routers? Thus the only PDU that arrives at PC2 from PC1 is the Packet and not the frame since the frame has been altered X amount of times making hopes between routers?
LBC90805: I'm going in for the CCENT on Cinco De Mayo and probably could have taken the test a month ago. Its just I'm scared of failing it. Wouldn't mind that much if taking the exam was free, but it is not. I have been toying with the thought of buying some exam questions from BOSON but they cost a lot of money sometimes too. The fellow on the CCENT CBT Nuggets Video says not to waste your money on Exam Sims, just take the test. You may pass it, you may not. But taking the real exam will tell you where you need to study more, and it will also give you the real ACID TEST if you will.
Turgon wrote: LBC90805 wrote: C and E make sense. As for segments, while not the correct answer they will be in the payload. To learn about those look for a book on windows sockets programming or a really good book on TCP/IP. Thats what I was wondering. If the data is being sent from PC to PC then what happens to the segments? I understand that the packets remain unchanged, and the Frames change throughout the path. But what about the upper layer data that is being transferred from PC to PC?
LBC90805 wrote: C and E make sense. As for segments, while not the correct answer they will be in the payload. To learn about those look for a book on windows sockets programming or a really good book on TCP/IP.
blake15 wrote: Turgon wrote: LBC90805 wrote: C and E make sense. As for segments, while not the correct answer they will be in the payload. To learn about those look for a book on windows sockets programming or a really good book on TCP/IP. Thats what I was wondering. If the data is being sent from PC to PC then what happens to the segments? I understand that the packets remain unchanged, and the Frames change throughout the path. But what about the upper layer data that is being transferred from PC to PC? It's in the payload and should move on hop by hop unchanged. If it didn't then what was transported wouldn't be much use to anyone. Routing and switching is about getting there..once the passengers disembark who cares what they do on holiday Many network professionals know relatively little about layer 4 and higher. Some awareness is good!
