Exam JN0-364 Topic 1 Question 156 Discussion
Actual exam question for Juniper's JN0-364 exam
Question #: 156
Topic #: 1
Question #: 156
Topic #: 1
Which two protocols would be used for dynamic routing in IPv6 environments? (Choose two.)
Suggested Answer: B,D Vote an answer
The transition to IPv6 requires routing protocols that are capable of carrying 128-bit address information.
Juniper Networks Junos OS supports several "IPv6-ready" protocols for dynamic routing.
1. IS-IS (Option B):
As discussed in previous questions,IS-ISis inherently extensible due to its use ofTLVs (Type, Length, Value)
. To support IPv6, the protocol did not need a major rewrite; instead, new TLVs (such as TLV 236 for IPv6 reachability and TLV 232 for IPv6 interface addresses) were added. A single IS-IS process in Junos can simultaneously carry both IPv4 and IPv6 routing information, making it a highly efficient choice for "dual- stack" service provider backbones.
2. BGP (Option D):
BGP was updated to support multiple protocols throughMultiprotocol Extensions (MP-BGP), defined in RFC 4760. By usingAddress Family Identifiers (AFI)andSubsequent Address Family Identifiers (SAFI), a single BGP session can exchange NLRI (Network Layer Reachability Information) for IPv4 unicast, IPv6 unicast, and even VPNv4/VPNv6 routes. In Junos, this is configured under the family inet6 unicast hierarchy within the BGP protocols configuration.
Why other options are incorrect:
* IGMP (Option A):This is a management protocol for IPv4 multicast (Internet Group Management Protocol). Its IPv6 equivalent isMLD (Multicast Listener Discovery).
* OSPFv2 (Option C):OSPF version 2 is strictly for IPv4. To run OSPF in an IPv6 environment,OSPFv3 must be used, as it was specifically redesigned to handle the IPv6 address space and link-local communication.
Juniper Networks Junos OS supports several "IPv6-ready" protocols for dynamic routing.
1. IS-IS (Option B):
As discussed in previous questions,IS-ISis inherently extensible due to its use ofTLVs (Type, Length, Value)
. To support IPv6, the protocol did not need a major rewrite; instead, new TLVs (such as TLV 236 for IPv6 reachability and TLV 232 for IPv6 interface addresses) were added. A single IS-IS process in Junos can simultaneously carry both IPv4 and IPv6 routing information, making it a highly efficient choice for "dual- stack" service provider backbones.
2. BGP (Option D):
BGP was updated to support multiple protocols throughMultiprotocol Extensions (MP-BGP), defined in RFC 4760. By usingAddress Family Identifiers (AFI)andSubsequent Address Family Identifiers (SAFI), a single BGP session can exchange NLRI (Network Layer Reachability Information) for IPv4 unicast, IPv6 unicast, and even VPNv4/VPNv6 routes. In Junos, this is configured under the family inet6 unicast hierarchy within the BGP protocols configuration.
Why other options are incorrect:
* IGMP (Option A):This is a management protocol for IPv4 multicast (Internet Group Management Protocol). Its IPv6 equivalent isMLD (Multicast Listener Discovery).
* OSPFv2 (Option C):OSPF version 2 is strictly for IPv4. To run OSPF in an IPv6 environment,OSPFv3 must be used, as it was specifically redesigned to handle the IPv6 address space and link-local communication.
by Reginald at Aug 20, 2026, 12:02 PM
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