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Computer Network MCA Question MCQ Set 12
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1. In OSPF database descriptor packet, if there are more database descriptor packets in the flow, ‘M’ field is set to ______
1
0
more
-1
2. In OSPF database descriptor packet, which field is used to detect a missing packet?
LSA header
MS
Database descriptor sequence number
Options
3. An OSPF router receives an LSA, the router checks its sequence number, and this number matches the sequence number of the LSA that the receiving router already has. What does the receiving router do with the LSA?
Ignores the LSA
Adds it to the database
Sends newer LSU update to source router
Floods the LSA to the other routers
4. An OSPF router receives an LSA. The router checks its sequence number and finds that this number is higher than the sequence number it already has. Which two tasks does the router perform with the LSA?
Ignores the LSA
Adds it to the database
Sends newer LSU update to source router
Floods the LSA to the other routers
5. An OSPF router receives an LSA. The router checks its sequence number and finds that this number is lower than the sequence number it already has. What does the router do with the LSA?
ignores the LSA
adds it to the database
sends newer LSU update to source router
floods the LSA to the other routers
6. Each LSA has its own age timer. By default, how long does an LSA wait before requiring an update?
30 seconds
1 minute
30 minutes
1 hour
7. The outcome of Dijkstra’s calculation is used to populate the ____
Topology table
Routing table
Neighbor table
Adjacency table
8. What is the IP protocol number for OSPF packets?
89
86
20
76
9. Which packet is NOT an OSPF packet type?
LSU
LSR
DBD
Query
10. Which multicast address does the OSPF Hello protocol use?
224.0.0.5
224.0.0.6
224.0.0.7
224.0.0.8
11. DBD packets are involved during which two states?
Exstart and exchange
Loading and Two-way
Init and Full
Down and Loading
12. At which interval does OSPF refresh LSAs?
10 seconds
30 seconds
30 minutes
1 hour
13. Which field is NOT a field within an OSPF packet header?
Packet length
Router ID
Authentication type
Maxage time
14. Which two commands are required for basic OSPF configuration?
“[Network mask] area [area-id]” and “Router ospf [process-id]”
“[Wildcard-mask] area [area-id]” and “[Network mask] area [area-id]”
Only “Router ospf [process-id]”
“[Wildcard-mask] area [area-id]” and “Router ospf [process-id]”
15. Which OSPF show command describes a list of OSPF adjacencies?
Show ip ospf interface
Show ip ospf
Show ip route
Show ip ospf neighbor
16. Datagram switching is done at which layer of OSI model?
Network layer
Network layer
Application layer
Transport layer
17. Packets in datagram switching are referred to as ________
Switches
Segments
Datagrams
Data-packets
18. Datagram networks mainly refers to _________
Connection oriented networks
Connection less networks
Telephone networks
Internetwork
19. Datagrams are routed to their destinations with the help of ________
Switch table
Segments table
Datagram table
Routing table
20. The main contents of the routing table in datagram networks are ______
Source and Destination address
Destination address and Output port
Source address and Output port
Input port and Output port
21. Which of the following remains same in the header of the packet in a datagram network during the entire journey of the packet?
Destination address
Source address
Checksum
Padding
22. Which of the following is true with respect to the delay in datagram networks?
Delay is greater than in a virtual circuit network
Each packet may experience a wait at a switch
Delay is not uniform for the packets of a message
All of the mentioned
23. During datagram switching, the packets are placed in __________ to wait until the given transmission line becomes available.
Stack
Queue
Hash
Routing table
24. The probability of the error in a transmitted block _________ with the length of the block
Remains same
Decreases
Increases
Is not proportional
25. Which of the following is false with respect to the datagram networks?
Number of flows of packets are not limited
Packets may not be in order at the destination
Path is not reserved
Delay is the same for all packets in a flow
26. Which of the following is / are the types of firewall?
Packet Filtering Firewall
Dual Homed Gateway Firewall
Screen Host Firewall
Dual Host Firewall
27. A proxy firewall filters at _____
Physical layer
Data link layer
Network layer
Application layer
28. A packet filter firewall filters at _____
Physical layer
Data link layer
Network layer or Transport layer
Application layer
29. What is one advantage of setting up a DMZ with two firewalls?
You can control where traffic goes in three networks
You can do stateful packet filtering
You can do load balancing
Improved network performance
30. What tells a firewall how to reassemble a data stream that has been divided into packets?
The source routing feature
The number in the header’s identification field
The destination IP address
The header checksum field in the packet header
31. A stateful firewall maintains a ______ which is a list of active connections.
Routing table
Bridging table
State table
Connection table
32. A firewall needs to be __________ so that it can grow proportionally with the network that it protects.
Robust
Expansive
Fast
Scalable
33. Complex networks today are made up of hundreds and sometimes thousands of _____
Documents
Documents
Servers
Entities
34. Performance management is closely related to _______
Proactive Fault Management
Fault management
Reactive Fault Management
Preventive Fault Management
35. Configuration management can be divided into two subsystems: reconfiguration and ____
Documentation
Information
Servers
Entity
36. In Network Management System, the term that is responsible for controlling access to network based on predefined policy is called _______
Fault Management
Secured Management
Active Management
Security Management
37. Control of users’ access to network resources through charges is the main responsibility of ______
Reactive Fault Management
Reconfigured Fault Management
Accounting Management
Security Management
38. The physical connection between an end point and a switch or between two switches is __________
Transmission path
Virtual path
Virtual circuit
Transmission circuit
39. Which of the following networks supports pipelining effect?
Circuit-switched networks
Message-switched networks
Packet-switched networks
Stream-switched networks
40. In Network Management System, maps track each piece of hardware and its connection to the _________
IP Server
Domain
Network
Data
41. MIB is a collection of groups of objects that can be managed by ____
SMTP
UDP
SNMP
TCP/IP
42. A network management system can be divided into _____
three categories
five broad categories
seven broad categories
ten broad categories
43. Ping can ____
Measure round-trip time
Report packet loss
Report latency
all of the mentioned
44. Ping sweep is a part of ______
Traceroute
Nmap
Route
Ipconfig
45. ICMP is used in _____
Ping
Traceroute
Ifconfig
Both Ping & Traceroute
46. _____ command is used to manipulate TCP/IP routing table.
route
Ipconfig
Ifconfig
Traceroute
47. If you want to find the number of routers between a source and destination, the utility to be used is ______
route
Ipconfig
Ifconfig
Traceroute
48. Which of the following is not related to ipconfig in Microsoft Windows?
Display all current TCP/IP network configuration values
Modify DHCP settings
Modify DNS settings
Trace the routers in the path to destination
49. ______ allows checking if a domain is available for registration.
Domain Check
Domain Dossier
Domain Lookup
Domain registers
50. Choose the wrong statement from the following.
Nslookup is used to query a DNS server for DNS data
Ping is used to check connectivity
Pathping combines the functionality of ping with that of route
Ifconfig can configure TCP/IP network interface parameters
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