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Config Lab: Static NAT 1
Config Lab: Syslog 3
When first starting out with Cisco routers and switches, log messages are those irritating messages that show up to interrupt us from the current task at hand. Over time, most of us find those messages more and more useful. Eventually,
Config Lab: Syslog 2
Most of us skim through descriptions of Syslog messages and message levels. This lab helps you slow down just a bit with a configuration exercise that makes you remember message severity levels and how to configure them. As usual, the
Config Lab: Syslog 1
Routers and switches issue log messages to tell us about different events. Be ready to run through the various options! Today’s lab exercises a couple of those options related to message formats and how a router chooses to manage Syslog
Config Lab: NTP Client/Server
NTP makes me think of old spy novels and movies, where the team would set their analog watches to the same time, and say something like “On my mark, it will be 9:55… mark!”. NTP uses other mechanisms, of course,
Config Lab: CDP/LLDP 1
#CDP has long been the default and favored protocol for a variety of device discovery functions, but LLDP offers an alternative as well. (LLDP is new to the exam topics per the May 2016 new CCENT and CCNA R&S exams.)
Config Lab: DAI 1
IP uses Address Resolution Protocol (ARP) to discover the MAC address used by other hosts in the same subnet. Unfortunately, cybersecurity attacks often use legitimate protocols in unintended ways to form an attack, and ARP is no exception. To help
Config Lab: DHCP Snooping 2
Dynamic Host Configuration Protocol (DHCP), like many network protocols, can be used as part of a cybersecurity attack. DHCP Snooping, a LAN switch feature, monitors DHCP messages flowing through the switch, filtering messages based on a set of rules. In
Config Lab: DHCP Snooping 1
The Dynamic Host Configuration Protocol (DHCP) protocol allows DHCP Clients to lease an IP address from a DHCP server. Simple enough. However, the protocol itself is open to various cybersecurity attacks. The LAN switch DHCP Snooping feature can monitor DHCP
