1What are the three common types of network documentation?
Physical and logical network topology diagrams, network device documentation, and network performance baseline documentation.
2What are the two types of network topology diagrams?
Physical and logical.
3To establish normal network performance to determine the personality of a network under normal conditions.
Purpose of a network baseline
4What are two good starting variables to measure when conducting an initial network baseline?
Interface utilization and CPU utilization.
5What is the recommended duration for capturing baseline data?
At a minimum, seven days long, but generally a two-to-four-week baseline is adequate.
6What does the show version command display?
Uptime and version information for device software and hardware.
7A summary status of all interfaces on a device.
show ip interface brief
8What command identifies the path a packet takes through the networks?
traceroute
9What are the seven steps of the detailed troubleshooting process?
Define the problem, Gather information, Analyze information, Eliminate possible causes, Propose hypothesis, Test hypothesis, and Solve the problem.
10Which troubleshooting approach is best when the problem is suspected to be a physical one?
Bottom-Up.
11Which troubleshooting approach starts at a middle layer and tests in both directions?
Divide-and-Conquer.
12Which troubleshooting approach involves physically swapping a suspected problematic device with a known, working one?
Substitution.
13To capture and display the physical layer to the application layer information contained in a packet.
Protocol analyzer like Wireshark
14What hardware troubleshooting tool measures electrical values of voltage, current, and resistance?
Digital Multimeter.
15What is the keyword for a Level 0 syslog message?
Emergencies
16What is the keyword for a Level 7 syslog message?
Debugging
17What are common causes of data link layer problems?
Encapsulation errors, address mapping errors, framing errors, and STP failures or loops.
18What issue can cause BOOTP and DHCP to fail over a NAT router?
DHCP uses a source IPv4 address of 0.0.0.0, but NAT requires a valid source IP.
19What are two of the most common utilities used to verify a problem with end-to-end connectivity?
Ping and traceroute.
20Which Windows command displays and modifies entries in the ARP cache?
arp
21Which command is useful when troubleshooting performance-related issues and hardware is suspected to be at fault?
show interfaces
22What Windows command is used to display the name-to-IP-address mapping information?
nslookup