How is an IPv4 multicast address mapped to an Ethernet MAC address?

The low-order 23 bits of the IPv4 address are copied into the low-order 23 bits of the MAC address, with the high-order bits set to 01:00:5E.

The entire 32-bit IPv4 address is copied into the last 32 bits of the MAC address.

The high-order 23 bits of the IPv4 address are copied into the low-order 23 bits of the MAC address, with the high-order bits set to 01:00:5E.

The IPv4 address is hashed to produce a 48-bit MAC address, ensuring a unique mapping for every multicast group.

What is a primary advantage of a shared tree in multicast?

It is always more efficient than a source tree for high-bandwidth sources.

It provides the shortest path from the source to every receiver.

It eliminates the need for receivers to join the group.

It requires less forwarding state in routers because all sources for a group share the same tree.

Juniper NetworksCertified Professional, Service Provider Routing and Switching (JNCIP-SP)

Domain 5Objective 1

Multicast Addressing and Traffic Flow JN0-664 Practice Questions (Page 1)

Part of the IP Multicast domain, which makes up ~18% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–11 in this domain), expect 1–1 from this objective — we provide 15 practice questions to prepare you well beyond it. (estimate)

15questions here

3free pages

6concepts

Questions 1–5

1foundation · easy
How is an IPv4 multicast address mapped to an Ethernet MAC address?
Select an answer first
2application · medium
A network engineer is configuring a multicast application that must be reachable across multiple sites within a company, but must not be reachable from the internet. Which address range should be used?
Select an answer first
3application · medium
A network administrator is configuring a multicast application and needs to ensure that the traffic is not forwarded beyond the local subnet. Which multicast address should be used?
Select an answer first
4application · medium
A network engineer is configuring a multicast application that must only be reachable within a single building. The engineer wants to use an IPv4 multicast address that will not be routed beyond the building's Layer 3 boundary. Which address range should be used?
Select an answer first
5foundation · easy
What is a primary advantage of a shared tree in multicast?
Select an answer first

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Multicast Addressing and Traffic Flow JN0-664 Practice Questions (Page 1)

Questions 1–5

How is an IPv4 multicast address mapped to an Ethernet MAC address?

A network engineer is configuring a multicast application that must be reachable across multiple sites within a company, but must not be reachable from the internet. Which address range should be used?

A network administrator is configuring a multicast application and needs to ensure that the traffic is not forwarded beyond the local subnet. Which multicast address should be used?

A network engineer is configuring a multicast application that must only be reachable within a single building. The engineer wants to use an IPv4 multicast address that will not be routed beyond the building's Layer 3 boundary. Which address range should be used?

What is a primary advantage of a shared tree in multicast?

Keep studying — IP Multicast