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widiansah

widiansah

C. 01:00:5e:28:12:95

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arditya

arditya

Answer : C
multicast MAC Address range of 01-00-5E-00-00-00 to 01-00-5E-7F-FF-FFnswer : C

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arditya

arditya

Answer : C
multicast MAC Address range of 01-00-5E-00-00-00 to 01-00-5E-7F-FF-FF

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humberto

humberto

Layer 2 delivery

Unicast packets are delivered to a specific recipient on an Ethernet or IEEE 802.3 subnet by setting a specific layer 2 MAC address on the Ethernet packet address. Broadcast packets make use of a broadcast MAC address (FF:FF:FF:FF:FF:FF), which includes setting the broadcast/multicast bit in the address.

IPv4 multicast packets are delivered using the Ethernet MAC address range 01:00:5e:00:00:00–01:00:5e:7f:ff:ff (with an OUI owned by the IANA). This range has 23 bits of available address space. The first octet (01) includes the broadcast/multicast bit. The lower 23 bits of the 28-bit multicast IP address are mapped into the 23 bits of available Ethernet address space. This means that there is ambiguity in delivering packets. If two hosts on the same subnet each subscribe to a different multicast group whose address differs only in the first 5 bits, Ethernet packets for both multicast groups will be delivered to both hosts, requiring the network software in the hosts to discard the unrequired packets.[4]

For IPv6 multicast addresses, the Ethernet MAC is derived by the four low-order octets OR’ed with the MAC 33:33:00:00:00:00, so for example the IPv6 address FF02:DEAD:BEEF::1:0:3 would map to the Ethernet MAC address 33:33:00:01:00:03.[5]

If a switch does not understand multicast addresses then it will broadcast traffic sent to a multicast group to all the members of a LAN; in this case the system’s network card (or operating system) has to filter the packets sent to multicast groups they are not subscribed to.

There are switches that listen to IGMP traffic and maintain a state table of which network systems are subscribed to a given multicast group. This table is then used to forward traffic destined to a given group only to a limited set of hosts (ports). This is done through the use of IGMP snooping.

Additionally, some switches with layer 3 capabilities can act as an IGMP querier. In networks where there is no router present to act as a multicast router, a switch with IGMP snooping enabled can be used to generate the needed IGMP messages to get users to subscribe to multicast traffic.

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Ben Christ

Ben Christ

New JN0-102 Exam Questions Updated Recently (8/May/2017):

NEW QUESTION 358
Which two statements describe the default behavior for OSPF? (Choose two.)

A. OSPF imports all routes into the inet4.0 routing table.
B. OSPF exports all static routes into the OSPF database.
C. OSPF imports all routes into the inet.0 routing table.
D. OSPF does not export static routes into the OSPF database.

Answer: CD

NEW QUESTION 359
Which two ping command parameters whould be used to troubleshoot MTU issues? (Choose two.)

A. ping do-not-fragment
B. ping rapid
C. ping verbose
D. ping size

Answer: AD

NEW QUESTION 360
Which command prompt indicates that you are in operational mode?

A. user @ router &
B. user @ router #
C. user @ router $
D. user @ router >

Answer: D

NEW QUESTION 361
Which keystroke combination allows users to move the cursor to the beginning of the command line without deleting text?

A. Ctrl + u
B. Ctrl + w
C. Ctrl + a
D. Ctrl + b

Answer: C

NEW QUESTION 362
What is the subnet mask for the 172.45.32.6/19 address?

A. 255.255.224.0
B. 255.255.240.0
C. 255.224.0.0
D. 255.240.0.0

Answer: A

NEW QUESTION 363
Click the Exhibit button. Referring to the exhibit, what happens when ping packets are sent to the management interface address of the local router?
user@router> show route protocol static
inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
+ = Active Route, – = Last Active, * = Both
99.0.0.0/17 *[Static/5] 00:00:11
————— > to 10.1.1.2 via ge-0/0/1.0
99.0.0.0/19 *[Static/5] 00:00:11
————— > to 10.1.2.2 via ge-0/0/2.0
99.0.0.0/24 *[Static/5] 00:00:11
————— > to 10.1.3.2 via ge-0/0/3.0
99.0.0.0/26 *[Static/5] 00:00:11
————— > to 10.1.4.2 via ge-0/0/4.0
Referring to the exhibit, which next-hop interface will be used to reach the 10.21.14.16 destination?

A. ge-0/0/1.0
B. ge-0/0/0.0
C. ge-0/0/3.0
D. ge-0/0/2.0

Answer: A

NEW QUESTION 364
What is the default firewall filter behavior when a term is matched but no terminating action is specified?

A. an implicit deny and the filter evaluation terminates
B. an implicit accept and the filter evaluation terminates
C. an implicit accept and the filter evaluation continues to the next term
D. an implicit deny and the filter evaluation continues to the next term

Answer: C

NEW QUESTION 365
What are three interface prefixes for a 40-gigabit interface? (Choose three.)

A. et
B. es
C. fte
D. xe
E. xle

Answer: ABE

NEW QUESTION 366
Which source of routing information is preferred by default?

A. static
B. RIP
C. direct
D. BGP

Answer: C

NEW QUESTION 367
For the interface ge-1/2/3.4, what does “ge” represent?

A. SONET/SDH
B. Gigabit Ethernet
C. Aggregated Ethernet
D. GRE

Answer: B

NEW QUESTION 368
Which word starts a command to display the operational status of a Junos device?

A. put
B. set
C. show
D. get

Answer: C

NEW QUESTION 369
……

P.S. These New JN0-102 Exam Questions Were Just Updated From The Real JN0-102 Exam, You Can Get The Newest JN0-102 Dumps In PDF And VCE From — http://www.passleader.com/jn0-102.html (408q VCE and PDF)

Good Luck!

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