Exam 300-115 topic 5 question 339 discussion

Actual exam question from Cisco's 300-115

Question #: 339
Topic #: 5

Which private VLAN can have only one VLAN and be a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports and the gateway?

A. isolated VLAN
B. primary VLAN
C. community VLAN
D. promiscuous VLAN

Show Suggested Answer

Suggested Answer: Explanation 🗳️
Understanding Primary, Isolated, and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics:
Primary VLAN-- The primary VLAN carries traffic from the promiscuous ports to the host ports, both isolated and community, and to other promiscuous ports.

Isolated VLAN --An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. You can

configure multiple isolated VLANs in a private VLAN domain; all the traffic remains isolated within each one. Each isolated VLAN can have several isolated ports, and the traffic from each isolated port also remains completely separate.
Community VLAN--A community VLAN is a secondary VLAN that carries upstream traffic from the community ports to the promiscuous port and to other host

ports in the same community. You can configure multiple community VLANs in a private VLAN domain. The ports within one community can communicate, but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN.
Reference:
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs.html

by 0nsp33d at Jan. 6, 2020, 1:08 p.m.

Comments

Submit Cancel

0nsp33d

5 years, 5 months ago

A: Isolated: only communicate with promiscuous ports. Notice that it cannot even communicate with another isolated port. Also, there can be only 1 isolated VLAN per PVLAN. https://www.certprepare.com/private-vlan

upvoted 2 times

...