A is the correct answer.
Note: Before you configure a UDP jitter operation on the source device, you must enable the IP SLAs responder on the target device (the operational target).
A is correct (UDP jitter)
"Before You Begin
Before configuring a UDP jitter operation on a source device, the IP SLAs Responder must be enabled on the target device (the operational target). The IP SLAs Responder is available only on Cisco IOS software-based devices. To enable the Responder, perform the task in the “Configuring the IP SLAs Responder on the Destination Device” section."
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/xe-16/sla-xe-16-book/sla-udp-jitter.html
"TCP Connect Operation
The IP SLAs TCP Connect operation measures the response time taken to perform a TCP Connect operation between a Cisco device and devices using IP. TCP is a transport layer (Layer 4) Internet protocol that provides reliable full-duplex data transmission. The destination device can be any device using IP or an IP SLAs Responder."
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/xe-16/sla-xe-16-book/sla-tcp-conn.html
) TCP Connect operation to measure the response time taken to perform a TCP Connect operation between a Cisco router and devices using IPv4 or IPv6. TCP Connect accuracy is enhanced by using the IP SLAs Responder at the destination Cisco router
Ans: Only TCP connect
cisco_R2#show runn | section ip sla
ip sla 1
udp-jitter 5.5.5.5 65000
frequency 5
ip sla schedule 1 life forever start-time now
cisco_R2#
cisco_R2#show ip sla summary
IPSLAs Latest Operation Summary
Codes: * active, ^ inactive, ~ pending
ID Type Destination Stats Return Last
(ms) Code Run
-----------------------------------------------------------------------
*1 udp-jitter 5.5.5.5 RTT=2 OK 19 seconds ago
cisco_R2#
far-end:
cisco_R5#show ip sla responder
General IP SLA Responder on Control port 1967
General IP SLA Responder on Control V2 port 1167
General IP SLA Responder is: Enabled
Number of control message received: 15 Number of errors: 0
Recent sources:
192.168.255.22 [23:25:38.444 UTC Sun Dec 18 2022]
192.168.255.22 [23:25:23.446 UTC Sun Dec 18 2022]
192.168.255.22 [23:25:08.448 UTC Sun Dec 18 2022]
192.168.255.22 [23:24:48.456 UTC Sun Dec 18 2022]
192.168.255.22 [23:24:28.443 UTC Sun Dec 18 2022]
Recent error sources:
Number of control v2 message received: 0 Number of errors: 0
Recent sources:
Recent error sources:
Permanent Port IP SLA Responder
Permanent Port IP SLA Responder is: Enabled
udpEcho Responder:
IP Address Port
84215045 65000
cisco_R5#
cisco_R5#s runn | s ip sla
ip sla responder
ip sla responder udp-echo ipaddress 5.5.5.5 port 65000
cisco_R5#
Correct answere is A
From the document on the link below "...It includes several operations as examples, including configuring the responder, configuring UDP jitter operation, which requires a responder, and configuring ICMP echo operation, which does not require a responder."
https://www.cisco.com/c/en/us/td/docs/switches/metro/me3600x_3800x/software/release/15-5_1_S/configuration/guide/3800x3600xscg/swipsla.pdf
Definitely A.
There are no service like to send an UDP response back for an UDP echo request.
So UDP echo responder is required for an UDP echo, UDP jitter SLA.
TCP is transport layer...the destination device can be ANY device using IP OR an IP SLA as a responder. Therefore TCP connect does not require a responder be configured in the remote end. Just that the remote end has an IP.
A is correct all the others can be terminated on an non Cisco device. But for jitter the destination has to understand the packet, so needs to be Cisco device.
"configuring UDP jitter operation, which
requires a responder, and configuring ICMP echo operation, which does not require a responder. "
So answer A is right
A.
"This section does not include configuration information for all available operations as the configuration information details are included in the Cisco IOS IP SLAs Configuration Guide. It does include several operations as examples, including configuring the responder, configuring UDP jitter operation, which requires a responder, and configuring ICMP echo operation, which does not require a responder. "
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/46sg/configuration/guide/Wrapper-46SG/swipsla.pdf
ip sla responder {tcp-connect | udp-echo} ipaddress ip-address port port-number
Configure the switch as an IP SLAs responder.
The optional keywords have these meanings:
•tcp-connect—Enable the responder for TCP connect operations.
•udp-echo—Enable the responder for User Datagram Protocol (UDP) echo or jitter operations.
•ipaddress ip-address—Enter the destination IP address.
•port port-number—Enter the destination port number.
Note The IP address and port number must match those configured on the source device for the IP SLAs operation.
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