H31-124_V2.0 Online Practice Questions and Answers

Which of the following statements regarding multicast MAC address is correct?

A. The first six hexadecimal value of the multicast Mac address is 0x01005e.

B. Multicast MAC address is composed of 23 bits.

C. The range of multicast MAC address is assigned by IEEE.

D. On Ethernet, 28-bits of layer 3 multicast IP address are mapped into the 24-bits of the layer 2 multicast MAC address.

Which of the following cannot be used to classify IP packets?

A. VIAN Priority

B. MAC

C. Protocol type

D. Port number

E. Packet precedence

F. Outbound Interface

Assuming that a router which only supports IP Precedence receives a packet marked with DSCP, which of the following statements is correct?

A. The last three bits of DSCP are set to 101.

B. Eight levels of AF in DSCP are mapped into eight levels of IP Precedence.

C. The first three bits of DSCP are mapped into three bits of IP Precedence.

D. All 8 bits of TOS are set to zero.

Which of the following statements disobey the basic principle of area division?

A. If the ISP runs OSPF protocol in the whole province network, then one city can be taken as one area.

B. In the network, there are some sub networks such as 110.1.1.0/24,110.1.2.0/24,110.1.3.0/24, 120.1.1.0/24,120.1.2.0/24 ,120.1.3.0/24.Then all the routers belonging to 110 network can be configured in one area.

C. One network maybe includes high-end, mid-end and low-end routers. Generally, all of these routers will be in same area.

D. Make all routers with larger routing-table into one area.

BGP Is an exterior gateway protocol which runs among ASs. It focuses on routes control and selection of optimal routes rather than discovery and calculation of routes.

A. True

B. False

In BGP4+, both the NUU field and next-hop attribute can be expressed with an IPv6 address and prefix.

A. True

B. False

Which of the BGP attributes is Optional transitive attribute?

A. AS_PATH

B. MED

C. NEXT_HOP

D. ORIGIN

E. LOCAL_PREF

F. COMMUNITY

Interface-based ACLs define rules based on inbound interfaces of packets to filter packets. Run the "traffic-filter command to invoke the ACL.

A. True

B. False

Affinity attributes is link attributes in MPLS TE, it is configured under physical interface.

A. True

B. False

There are two MAC address learning modes in the VPLS: unqualified and qualified. In qualified mode, all VLANs are processed by the same VSI and they share the same broadcast domain or MAC address space.

A. True

B. False