Practice Free 4A0-D03 Exam Online Questions
A host is connected to a MAC-VRF on leaf1 and leaf2. The MAC-VRF interfaces on leaf1 and leaf2 are associated to an Ethernet segment configured for active-standby multi-homing.
Which of the following statements is FALSE?
- A . Leaf1 and leaf2 will hold an election to identify which leaf router will be the DF for the MAC-VRF.
- B . Only the DF will accept traffic from the host.
- C . The DF will forward all BUM traffic from the remote PEs to the host.
- D . The non-DF is capable of forwarding unicast traffic from the remote PEs to the host.
Consider the exhibit.
Which of the following statements is FALSE?
- A . The remote host’s IP address is 100.0.2.3.
- B . The MAC address 00:00:00:00:00:01 was learned through the data plane.
- C . The MAC address associated to the vxlan-interface will not age out.
- D . The VXLAN network identifier configured for this MAC-VRF is 100.
Which of the following statements about PE-CE routing is FALSE?
- A . There are two methods to implement routing between the PE and CE, static and dynamic.
- B . BGP is the preferred option for PE-CE routing as it scales better than static routing.
- C . eBGP is preferred which means that the PE and CE are required to be in different autonomous systems.
- D . The CE advertises BGP EVPN route type 5 updates to the PE and the PE forwards to other PEs.
Leaf routers are configured to support Layer 2 multi-homing all-active mode.
Which of the following statements is FALSE?
- A . A LAG must be configured on the participating leaf routers.
- B . If VLAN tagging is to be used, then it must be enabled on the LAG interface.
- C . If using LACP, the system-id-mac must uniquely identify each leaf router connected to the host.
- D . The LAG interface must then be associated with the Ethernet segment.
Which of the following statements about the gateway-less data center interconnect solution is FALSE?
- A . It provides a clear demarcation for security between the border leaf and gateway.
- B . All of the data centers leaf routers must be reachable over the WAN network.
- C . The route reflectors must be reachable between different data centers.
- D . The data center border leaf and gateway can use either eBGP or static routes to exchange routing information.
Which of the following four symmetric routing options does NOT require the use of an EVPN route-type 2?
- A . Host routing
- B . Prefix routing interface-less
- C . Prefix routing interface-ful numbered
- D . Prefix routing interface-ful unnumbered
Consider the exhibit.
All three of the leafs have a MP-BGP EVPN session to the route-reflector Spine-1. Leaf-1, Leaf-2 and Leaf-3 have existing instances of an L2 EVPN named MAC VRF-1. Host-1 has just sent its first Ethernet frame into MAC VRF-1 on Leaf-1.
Which of the following steps is FALSE?
- A . Leaf-1 populates Host-l’s MAC address learnt on the local interface to its MAC table.
- B . Leaf-1 generates an EVPN route-type 5 update with Host-l’s MAC address and sends it to the route reflector.
- C . The route-reflector forwards the EVPN update to Leaf-2 and Leaf-3.
- D . Leaf-2 and Leaf-3 import the EVPN update based upon the route target.
Which of the following statements does NOT describe the functionality or operation of the integrated gateway-based data center interconnect solution?
- A . The data center gateway and the WAN PE functions are performed on a single router.
- B . The border leaf router will utilize eBGP or static routes to interconnect with the gateway.
- C . The data center gateway needs to provide interworking between the VXLAN and the WAN tunneling protocol.
- D . The data center gateway needs to be able to re-advertise layer 3 EVPN routes of the leaf routers into VPN-IPv4 or VPN-IPv6 routes if required.
Which of the following statements about configuring and using an integrated routing and bridging (IRB) interface is TRUE?
- A . The IRB sub-interface must be configured as either type bridge or routed.
- B . A MAC-VRF can be configured with multiple IRB sub-interfaces to support multi-homing.
- C . When the IRB sub-interface is configured with multiple IP addresses, one of them can be configured as the primary.
- D . When using an IRB interface to interconnect a MAC-VRF to an IP-VRF, one sub-interface is configured for the MAC-VRF and another one for the IP-VRF.
An IRB sub-interface that is being used to interconnect a MAC-VRF to an IP-VRF, is configured with anycast-gw set to true and anycast-gw enabled.
Which of the following statements is FALSE?
- A . The last octet of the default virtual MAC assigned to the sub-interface is derived from the last octet of the chassis MAC.
- B . The same IP address used on this sub-interface can be used by other IRB sub-interfaces on remote PEs participating in the IP-VRF.
- C . The host IP address of the sub-interface appears in the IP-VRF route table along with the prefix for the entire sub-net.
- D . Two MAC addresses associated to the sub-interface are shown in the forwarding table of the MAC-VRF that contains the IRB sub-interface.