Question
No: 1
Which Cisco proprietary protocol will
be used in LAN switches to control multicast traffic at the data link layer
within a LAN switch?
A. MAC filters
B. Cisco Group
Management Protocol (CGMP)
C. Cisco Discovery
Protocol (CDP)
D. IGMP
Answer: B
Explanation: CGMP
Cisco Group Management Protocol is a
Cisco proprietary protocol implemented to control multicast traffic at Layer 2.Because
a Layer 2 switch is unaware of Layer 3 IGMP messages,it cannot keep multicast
packets from being sent to all ports.With CGMP,the LAN switch can speak
with the IGMP router to find out the MAC addresses of the hosts that want to
receive the multicast packets.You must also enable the router to speak CGMP with
the LAN switches.With CGMP,switches distribute multicast sessions to the switch
ports that have group members. Cisco Press CCDA 640-864 Official Certification
Guide Fourth Edition, Chapter 3
Question
No: 2
Which two link state
routing protocols support IPv6 routing? (Choose
two)
A. BGP4+
B. OSPF
C. RIPng
D. EIGRP
E. IS-IS
Answer:
B,E
Explanation:
only OSPF & IS-IS are
LSPs which support IPv6.Link:http://www.cisco.com/en/US/partner/products/ps10591/products_installation_and_configuration_guides_list.html
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