Infosys Certified Datacom - Layer 3 Routing Specialist
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Real Lex exam-pattern multiple-choice questions for the Infosys Certified Datacom - Layer 3 Routing Specialist certification. Each question includes the correct answer. The full question bank is available to Premium members.
- Question 1
Difference between OSPF Designated Router and IS-IS DIS are
- ✓ OSPF defines DR and Back DR where as in IS-IS there is no need for backup DIS Correct
- B Router with highest priority is configured as DIS in IS-IS where as router with highest configured router ID is selected as DR in OSPF
- C OSPF DR uses the multicast IP address 224.0.0.5 to send LSA to other routers in Non Broadcast Multi-Access networks whereas ISIS DIS uses unicast messages for communication in NBMA networks.
- D All of the above.
- Question 2
Select the right statement with respect to OSPF Stub area and ASBR
- ✓ ASBR cannot be part of any stub area Correct
- B ASBR can be part of stub area, but not part of Totally Stubby Area
- C ASBR can be part of NSSA, but cannot be part of Stub area or totally Stub Area
- D ASBR can be part of any stub area as long as it sends only type 7 LSA.
- Question 3
BGP starts exchanging UPDATE packets with its peers once the neighbor negotiation reaches ____________ stage
- ✓ OPEN Correct
- B ESTABLISHED
- C ACTIVE
- D OpenSent
- Question 4
A VRRP Router in ________________ state functions as forwarding router for the virtual IP address associated with the Virtual Router
- ✓ Init State Correct
- B Master State
- C Backup State
- D None of the above
- Question 5
In an OSPF – Not So Stubby Area (NSSA), ______________ converts the type 7 LSA to type 5 LSA and sends it to backbone
- ✓ ASBR Correct
- B ABR
- C Internal Routers
- D None of the above
- Question 6
A socket address is a combination of
- ✓ IP address & Port Correct
- B IP address, Port and Protocol type
- C Ip address, MAC address and port
- D MAC address. protocol and port
- Question 7
___________ field is used to distinguish between the IPv6 packets with different real time delivery requirements to identify the priorities and different classes of the packets
- ✓ Flow Label Correct
- B Traffic Class
- C Next Header
- D None of the above
- Question 8
Routing of packets from an OSPF stub area to external world will be based on
- ✓ Stub area is an isolated network and cannot send packets outside. Correct
- B Type 7 LSA flooded within the Stub Area
- C Redistributed routes from ASBR connected to stub area
- D Default route
- Question 9
From routing perspective, convergence time means
- ✓ Time taken by routers to reach an agreement on how the network topology looks like. Correct
- B Time taken by routing updates to reach all routers within an AS
- C Time taken by router to send a routing update once a link flap is detected
- D None of the above
- Question 10
OSPF router conversations with its neighboring routers are described using
- ✓ Interface Table Correct
- B LSA
- C neighbor data structure
- D All of the above.
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