You have been tasked by your manager to implement syslog in your network. Which option is an important factor to consider in your implementation?
A. Use SSH to access your syslog information.
B. Enable the highest level of syslog function available to ensure that all possible event messages are logged.
C. Log all messages to the system buffer so that they can be displayed when accessing the router.
D. Synchronize clocks on the network with a protocol such as Network Time Protocol.
Correct Answer: D
Explanation/Reference:
Explanation:
http://www.cisco.com/en/US/docs/solutions/Enterprise/Security/Baseline_Security/sec_chap5.htm l
Time Synchronization
When implementing network telemetry, it is important that dates and times are both accurate and synchronized across all network infrastructure devices.
Without time synchronization, it is very difficult to correlate different sources of telemetry.
Enabling Network Time Protocol (NTP) is the most common method of time synchronization.
General best common practices for NTP include:
A common, single time zone is recommended across an entire network infrastructure in order to enable the consistency & synchronization of time across all network devices. The time source should be from an authenticated, limited set of authorized NTP servers. Detailed information on NTP and
NTP deployment architectures is available in the Network Time Protocol:
Best
Practices White Paper at the following URL:
Get Latest & Actual 640-554 Exam’s Question and Answers from Passleader.
http://www.passleader.com
http://www.cisco.com/warp/public/126/ntpm.pdf
Timestamps and NTP Configuration
In Cisco IOS, the steps to enable timestamps and NTP include:
Step 1 Enable timestamp information for debug messages.
Step 2 Enable timestamp information for log messages.
Step 3 Define the network-wide time zone.
Step 4 Enable summertime adjustments.
Step 5 Restrict which devices can communicate with this device as an NTP server. Step 6 Restrict which devices can communicate with this device as an NTP peer. Step 7 Define the source IP address to be used for NTP packets.
Step 8 Enable NTP authentication.
Step 9 Define the NTP servers.
Step 10 Define the NTP peers.
Step 11 Enable NTP to update the device hardware clock
