Explanation
With Synchronous ( sync yes), the CLI command in question is not executed until the policy exits.
Whether or not the command runs depends on the value for the variable _exit_status. If
_exit_status is 1, the command runs, if it is 0, the command is skipped.

Explanation
EEM offers the ability to monitor events and take informational or corrective action when the monitored events occur or reach a threshold. An EEM policy is an entity that defines an event and the actions to be taken when that event occurs. There are two types of EEM policies: an applet or a script. An applet is a simple form of policy that is defined within the CLI configuration.
To specify the event criteria for an Embedded Event Manager (EEM) applet that is run by sampling Simple Network Management Protocol (SNMP) object identifier values, use the event snmp command in applet configuration mode.
event snmp oid oid-value get-type {exact | next} entry-op operator entry-val entryvalue
[exit-comb {or | and}] [exit-op operator] [exit-val exit-value] [exit-time exit-timevalue] poll-interval poll-int-value
+ oid: Specifies the SNMP object identifier (object ID)
+ get-type: Specifies the type of SNMP get operation to be applied to the object ID specified by the oid-value argument.
- next - Retrieves the object ID that is the alphanumeric successor to the object ID specified by the oid-value argument.
+ entry-op: Compares the contents of the current object ID with the entry value using the specified operator. If there is a match, an event is triggered and event monitoring is disabled until the exit criteria are met.
+ entry-val: Specifies the value with which the contents of the current object ID are compared to decide if an SNMP event should be raised.
+ exit-op: Compares the contents of the current object ID with the exit value using the specified operator. If there is a match, an event is triggered and event monitoring is reenabled.
+ poll-interval: Specifies the time interval between consecutive polls (in seconds) Reference: https://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtioseem.html Question 2

Explanation
Windows can actually block your WiFi signal. How? Because the signals will be reflected by the glass.
Some new windows have transparent films that can block certain wave types, and this can make it harder for your WiFi signal to pass through.
Tinted glass is another problem for the same reasons. They sometimes contain metallic films that can completely block out your signal. Mirrors, like windows, can reflect your signal. They're also a source of electromagnetic interference because of their metal backings.
Reference: https://dis-dot-dat.net/what-materials-can-block-a-wifi-signal/
An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated until it glows. WiFi operates in the gigahertz microwave band. The FCC has strict regulations on RFI (radio frequency interference) from all sorts of things, including light bulbs -> Incandesent lights do not interfere Wi-Fi networks.
Note:
+ Many baby monitors operate at 900MHz and won't interfere with Wi-Fi, which uses the 2.4GHz band. + DECT cordless phone 6.0 is designed to eliminate wifi interference by operating on a different frequency.
There is essentially no such thing as DECT wifi interference.

Explanation
Cisco DNA Center provides an interactive editor called Template Editor to author CLI templates. Template Editor is a centralized CLI management tool to help design a set of device configurations that you need to build devices in a branch. When you have a site, office, or branch that uses a similar set of devices and configurations, you can use Template Editor to build generic configurations and apply the configurations to one or more devices in the branch.
Reference: https://www.cisco.com/c/en/us/td/docs/cloud-systemsmanagement/ network-automation-and-management/dna-center/1-
3/user_guide/b_cisco_dna_center_ug_1_3/b_cisco_dna_center_ug_1_3_chapter_0
111.html