What are the three variants of NTPv4? (Choose three.)
A. client/server
B. broadcast
C. symmetric
D. multicast
E. asymmetric
F. unicast
What are the three variants of NTPv4?
What are the three variants of NTPv4? (Choose three.)
A. client/server
B. broadcast
C. symmetric
D. multicast
E. asymmetric
F. unicast
ABC
https://tools.ietf.org/html/rfc5905
Protocol Modes
There are three NTP protocol variants: symmetric, client/server, and broadcast
ABC
see RFC5905
3. Protocol Modes
There are three NTP protocol variants: symmetric, client/server, and
broadcast. Each is associated with an association mode (a
description of the relationship between two NTP speakers) as shown in
Figure 1. In addition, persistent associations are mobilized upon
startup and are never demobilized. Ephemeral associations are
mobilized upon the arrival of a packet and are demobilized upon error
or timeout.
+——————-+——————-+——————+
| Association Mode | Assoc. Mode Value | Packet Mode Value|
+——————-+——————-+——————+
| Symmetric Active | 1 | 1 or 2 |
| Symmetric Passive | 2 | 1 |
| Client | 3 | 4 |
| Server | 4 | 3 |
| Broadcast Server | 5 | 5 |
| Broadcast Client | 6 | N/A |
+——————-+——————-+——————+
ACD
https://community.cisco.com/t5/networking-documents/network-time-protocol-version-4-ntpv4/ta-p/3149426
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/15-2mt/ipv6-15-2mt-book/ip6-ntpv4.pdf