Asked by شسي

31. At which layer of the OSI model would you assume the problem is if you type
show interface serial 1and receive the following message?
Serial1 is down, line protocol is down
a. Physical layer
b. Data Link layer
c. Network layer
d. None;it is a router problem.
32. Which command can be used to determine a router’s CPU utilization?
a. show version
b. show controllers
c. show processes cpu
d. show memory
33. You are troubleshooting a connectivity problem in your corporate network and want to
isolate the problem. You suspect that a router on the route to an unreac hable network is at fault. What
IOS user execcommand should you issue?
a. Router>ping
b. Router>trace
c. Router>show ip route
d. Router>show interface
e. Router>show cdp neighbors
34. You copy a configuration from a network host to a router’s RAM. The configuration
looks correct, yet it is not working at all. What could the problem be?
a. You copied the wrong configuration into RAM.
b. You copied the configuration into flash memory instead.
c. The copy did not override the shutdowncommand in running-config.
d. The IOS became corrupted after the copycommand was initiated.
35. In the following command, what does the IP address 10.10.10. 254 refer to?
Router#config t
Router(config)#interface fa0/0
Router(config-if)#ip helper-address 10.10.10.254
a. IP address of the ingress interface on the router
b. IP address of the egress interface on the router
c. IP address of the next hop on the path to the DHCP server
d. IP address of the DHCP server

All Answers 1

Answered by GPT-5 mini AI
31. a. Physical layer
Explanation: "Serial1 is down, line protocol is down" indicates a physical/link failure; both down usually point to a Layer 1 (physical) issue.

32. c. show processes cpu
Explanation: "show processes cpu" (or "show processes cpu history") displays CPU utilization on IOS.

33. b. Router>trace
Explanation: traceroute (trace) shows the path and where packets stop, helping isolate which router is at fault. (Ping checks reachability but traceroute locates the hop.)

34. c. The copy did not override the shutdown command in running-config.
Explanation: Copying a config into RAM (running-config) merges with the current config; an existing "shutdown" may remain unless you explicitly change it (or copy to startup and reload to replace).

35. d. IP address of the DHCP server
Explanation: ip helper-address forwards DHCP broadcasts to the specified DHCP server IP.