A web-based application is responding very slowly. The network administrator is looking at the following
information from the transparent web proxy, which is configured in virtual-wire mode and is in the between the
company’s network and the Internet.
Given the above information, which of the following is the layer of the OSI model at which the issue is occurring
and the MOST likely reason it is occurring? (Select two.)
A.
Layer 1
B.
Layer 4
C.
Layer 3
D.
Layer 7
E.
The application crashed
F.
NO IP addresses on interfaces
G.
Excessive TCP resets
H.
Bad cable
Explanation:
http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1907.html
https://blog.ruxit.com/detecting-network-errors-impact-on-services/
A + H
RX information:
errors can result from faulty network cables, faulty hardware (e.g., NICs, switch ports), CRC errors, or a speed or duplex mismatch between computer and switch, which would also manifest itself in a high number of collisions (CSMA/CD sends its regards). You can check the configuration on your computer using ethtool to find out at which speed your network interface is operating and if the connection is full duplex or not.
TX information:
errors shows the number of errors that occurred while transmitting packets due to carrier errors (duplex mismatch, faulty cable), fifo errors, heartbeat errors, and window errors.
So a bad cable is most likely, and a bad cable is under OSI layer 1.
1
0
Does it say Layer 3 because it is dealing with “packets” and the transmission of packets happen at the Network/Layer3 layer?
0
0