Routing and Switching MCQs with Answers
Practice important Routing and Switching MCQs with answers and explanations.
Chapter: 89
Q1001:
What is the purpose of a Type 2 DBD packet in OSPF?
A. To provide an abbreviated list of the sending router's LSDB
B. To request more information about an entry in the DBD
C. To reply to an LSR packet
D. To advertise routing updates
Correct Answer:
A
Chapter: 89
Q1002:
Fill in the blank: The OSPF Type 4 LSU packet is used to ________.
A. Reply to an LSR packet
B. Send Hello packets
C. Advertise parameters for DR/BDR election
D. Create an adjacency with a neighbor
Correct Answer:
A
Chapter: 89
Q1003:
What are OSPF LSAs used for?
A. To contain information about OSPF routing updates
B. To establish neighbor adjacencies
C. To calculate SPF trees
D. To perform routing table lookups
Correct Answer:
A
Chapter: 89
Q1004:
Fill in the blank: OSPF Hello packets are transmitted to multicast address _______ in IPv6.
A. FF02::5
B. FF02::1
C. FF02::2
D. FF02::3
Correct Answer:
A
Chapter: 89
Q1005:
What does the OSPF Packet Header identify?
A. Router ID and Area ID
B. Type of OSPF packet
C. Dead Interval
D. Link-State Advertisement
Correct Answer:
B
Chapter: 89
Q1006:
What is the role of the Dead Interval in OSPF?
A. It determines how long a router waits before declaring a neighbor down
B. It specifies the frequency of sending Hello packets
C. It identifies the OSPF router ID
D. It determines the router's priority in DR/BDR election
Correct Answer:
A
Chapter: 89
Q1007:
Fill in the blank: An LSU packet can contain up to ______ different types of OSPFv2 LSAs.
A. 11
B. 12
C. 13
D. 14
Correct Answer:
A
Chapter: 89
Q1008:
What information does the Data Link Ethernet Frame Header in OSPF messages contain?
A. Destination multicast MAC addresses
B. OSPF packet type
C. IPv4 protocol field
D. OSPF packet type information
Correct Answer:
A
Chapter: 90
Q1009:
What is the purpose of the Hello packet in OSPF?
A. To establish neighbor adjacencies
B. To flood LSAs
C. To synchronize LSDBs
D. To elect the DR and BDR
Correct Answer:
A
Chapter: 90
Q1010:
Fill in the blank: The router ID in OSPF is used to _______.
A. Uniquely identify each router
B. Determine the Hello Interval
C. Set the Dead Interval
D. Establish the DR and BDR election
Correct Answer:
A
Chapter: 90
Q1011:
What action occurs when two OSPF neighbors are interconnected over a point-to-point link?
A. They transition immediately to the database synchronization phase
B. They elect a DR and BDR
C. They create multiple adjacencies
D. They exchange Hello packets
Correct Answer:
A
Chapter: 90
Q1012:
Fill in the blank: After the Two-Way state, routers transition to _______ states.
A. Database synchronization
B. ExStart
C. Loading
D. Full
Correct Answer:
A
Chapter: 90
Q1013:
What is included in a DBD packet?
A. LSA entry header information
B. OSPF packet type information
C. Router ID and Area ID
D. Network Mask and Hello Interval
Correct Answer:
A
Chapter: 90
Q1014:
Fill in the blank: The router with the _______ router ID acts as the master in the Exchange state.
A. Higher
B. Lower
C. Equal
D. Random
Correct Answer:
A
Chapter: 90
Q1015:
What happens if the DBD packet received by R1 has a more current link-state entry?
A. R1 transitions to the Loading state
B. R1 transitions to the ExStart state
C. R1 ignores the DBD packet
D. R1 sends an LSR packet
Correct Answer:
A
Chapter: 90
Q1016:
Fill in the blank: The network remains in the topology database as long as neighboring routers continue receiving _______.
A. Hello packets
B. LSA packets
C. DBD packets
D. LSR packets
Correct Answer:
A
Chapter: 90
Q1017:
What must be satisfied before adjacent routers are considered synchronized and in a full state?
A. All LSRs
B. All DBD packets
C. All Hello packets
D. All LSUs
Correct Answer:
A
Chapter: 90
Q1018:
Fill in the blank: On multiaccess networks, OSPF elects a _______ to be the collection and distribution point for LSAs.
A. Designated Router (DR)
B. Backup Designated Router (BDR)
C. Router ID
D. Neighbor
Correct Answer:
A
Chapter: 90
Q1019:
What is the role of the Backup Designated Router (BDR) in OSPF?
A. To take over if the DR fails
B. To manage the Hello packets
C. To maintain the LSDB
D. To synchronize databases
Correct Answer:
A
Chapter: 90
Q1020:
Fill in the blank: The OSPF protocol ensures that updates are sent only when _______.
A. A change is perceived or every 30 minutes
B. A change is perceived every hour
C. Every 10 minutes
D. An LSR packet is received
Correct Answer:
A