you're missing the point of "own shared" in the answer "A" - if the memory space is shared, it is not protected in any way and other processes can easily compromise the given process. If it said "own dedicated", I'd agree
Answer is D
[email protected]> show system processes extensive | trim 66 | grep "^.*d$"
COMMAND
chassisd
sshd
mgd
mib2d
snmpd
authd
authd
l2ald
pfed
ppmd
eventd
l2cpd
jdhcpd
jdhcpd
shm-rtsdbd
vccpd
rpd
These are not shared, they are protected and "multiple processes simultaneously"
https://www.juniper.net/documentation/us/en/software/junos/junos-overview/topics/concept/junos-software-introduction.html
Although individual architecture modules of Junos OS communicate through well-defined interfaces, each module runs in its own protected memory space, preventing one module from disrupting another.
Would appear the question is incorrect - as per your ref "Each process runs in its own protected memory space," how ever the question posed states "own shared" - thats just an oxymoron and most likely the result of a typo or someone just Regurgitating a question incorrectly - B & C are totally off the mark and D would only be valid in the case of Secure NTP - so would go with "A" even though its wrong - persae
Answer is D
Junos OS consists of multiple processes that run on different platforms and have unique functions. The separation of functions provides operational stability, because each process accesses its own protected memory space.
its "own protected" rules out memory space.
https://www.juniper.net/documentation/en_US/junos/topics/reference/general/junos-os-processes.html
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