![MCQs [2024]](https://engineeringinterviewquestions.com/wp-content/uploads/2021/02/Interview-Questions-2.png)
Q1. What Is Region ?
When hierarchical routing is used, the routers are divided into what we call regions, with each router knowing all the details about how to route packets to destinations within its own region, but knowing nothing about the internal structure of other regions.
Q2. What Is Attenuation ?
The degeneration of a signal over distance on a network cable is called attenuation.
Q3. What Is Kerberos ?
It is an authentication service developed at the Massachusetts Institute of Technology. Kerberos uses encryption to prevent intruders from discovering passwords and gaining unauthorized access to files.
Q4. What Is Igp (interior Gateway Protocol) ?
It is any routing protocol used within an autonomous system.
Q5. What Are Major Types Of Networks And Explain ?
- Server-based network
- Peer-to-peer network
- Peer-to-peer network, computers can act as both servers sharing resources and as clients using the resources.
- Server-based networks provide centralized control of network resources and rely on server computers to provide security and network administration.
Q6. What Is Brouter ?
Hybrid devices that combine the features of both bridges and routers.
Q7. What Is Source Route ?
It is a sequence of lP addresses identifying the route a datagram must follow. A source route may optionally be included in an IP datagram header.
Q8. What Is Raid ?
A method for providing fault tolerance by using multiple hard disk drives.
Q9. What Is Slip (serial Line Interface Protocol) ?
It is a very simple protocol used for trmission of IP datagrams across a serial line.
Q10. What Does The Mount Protocol Do ?
The Mount protocol returns a file handle and the name of the file system in which a requested file resides. The message is sent to the client from the server after reception of a client’s request.
Q11. What Are The Two Types Of Trmission Technology Available ?
- Broadcast and
- point-to-point
Q12. Which Protocol Does Https Uses At The Trport Layer For Sending And Receiving Data?
TCP.
Q13. What Is The Minimum And Maximum Length Of The Header In The Tcp Segment And Lp Datagram?
The header should have a minimum length of 20 bytes and can have a maximum length of 60 bytes.
Q14. What Is A Management Information Base (mib) ?
A Management Information Base is part of every SNMP-managed device. Each SNMP agent has the MIB database that contains information about the device’s status, its performance, connections, and configuration. The MIB is queried by SNMP.
Q15. What Is The Range Of Addresses In The Classes Of Internet Addresses ?
Class A 0.0.0.0 – 127.255.255.255
Class B 128.0.0.0 – 191 .255.255.255
Class C 192.0.0.0 – 223.255.255.255
Class D 224.0.0.0 – 239.255.255.255
Class E 240.0.0.0 – 247.255.255.255
Q16. What Are 10base2, 10base5 And 10baset Ethernet L ?
10Base2: An Ethernet term meaning a maximum trfer rate of 10 Megabits per second that uses baseband signaling, with a contiguous cable segment length of 100 meters and a maximum of 2 segments.
10Base5: An Ethernet term meaning a maximum trfer rate of 10 Megabits per second that uses baseband signaling, with 5 continuous segments not exceeding 100 meters per segment.
10BaseT: An Ethernet term meaning a maximum trfer rate of 10 Megabits per second that uses baseband signaling and twisted pair cabling.
Q17. In An Icmp Address Mask Request, What Is The Attacker Looking For?
The attacker is looking for the subnet/network mask of the victim. This would help the attacker to map the internal network.
Q18. What Protocol Is Used By Dns Name Servers ?
DNS uses UDP for communication between servers, It is a better choice than TCP because of the improved speed a connectionless protocol offers. Of course, trmission reliability suffers with UDP.
Q19. Why Is Rip V1 Insecure In A Network?
RIP v1 does not use a password for authentication as with Rip v@This makes it possible to attackers to send rogue RIP packets and corrupt the routing table.
Q20. What Is Gateway-to-gateway Protocol ?
It is a protocol formerly used to exchange routing information between Internet core routers.
Q21. What Is A Multi-homed Host ?
It is a host that has a multiple network interfaces and that requires multiple IP addresses is called as a Multi-homed Host.
Q22. What Is The Hello Protocol Used For ?
The HELLO protocol uses time instead of distance to determine optimal routing. It is an alternative to the Routing Information Protocol.
Q23. What Is External Data Representation ?
External Data Representation is a method of encoding data within an RPC message, used to ensure that the data is not system-dependent.
Q24. What Is Passive Topology ?
When the computers on the network simply listen and receive the signal, they are referred to as passive because they don’t amplify the signal in any way. Example for passive topology – linear bus.
Q25. Explain The Function Of Trmission Control Block ?
A TCB is a complex data structure that contains a considerable amount of information about each connection.
Q26. What Is Beaconing ?
The process that allows a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not receiving the trmissions. Beaconing is used in Token ring and FDDI networks.
Q27. What Is The Difference Between Routable And Non- Routable Protocols ?
Routable protocols can work with a router and can be used to build large networks. Non-Routable protocols are designed to work on small, local networks and cannot be used with a router
Q28. Bootp Helps A Diskiess Workstation Boot. How Does It Get A Message To The Network Looking For Its Lp Address And The Location Of Its Operating System Boot Files ?
BQOTP sends a UDP message with a subnetwork broadcast address and waits for a reply from a server that gives it the IP address. The same message might contain the name of the machine that has the boot files on it. If the boot image location is not specified, the workstation sends another UDP message to query the server.
Q29. Name One Secure Network Protocol Which Can Be Used Instead Of Telnet To Manage A Router?
SSH.
Q30. What Is Virtual Channel ?
Virtual channel is normally a connection from one source to one destination, although multicast connections are also permitted. The other name for virtual channel is virtual circuit.
Q31. What Is Bandwidth
Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.
Q32. What Is Mac Address ?
The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.
Q33. Difference Between Bit Rate And Baud Rate?
Bit rate is the number of bits trmitted during one second whereas baud rate refers to the number of signal units per second that are required to represent those bits.
baud rate = bit rate / N
where N is no-of-bits represented by each signal shift.
Q34. What Is Netbios And Netbeui ?
NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications.
NETBEUI is NetBIOS extended user interface. A trport protocol designed by microsoft and IBM for the use on small subnets.
Q35. Which Feature On A Cisco Ios Firewall Can Be Used To Block Incoming Traffic On A Ftp Server?
Extended ACL.
Q36. What Is A Dns Resource Record ?
A resource record is an entry in a name server’s database. There are several types of resource records used, including name-to-address resolution information. Resource records are maintained as ASCII files.
Q37. What Is Difference Between Baseband And Broadband Trmission ?
In a base band trmission, the entire bandwidth of the cable is consumed by a single signal. In broadband trmission, signals are sent on multiple frequencies, allowing multiple signals to be sent simultaneously.
Q38. What Do You Meant By “triple X” In Networks ?
The function of PAD (Packet Assembler Disassembler) is described in a document known as X.@The standard protocol has been defined between the terminal and the PAD, called X.28; another standard protocol exists between hte PAD and the network, called X.2@Together, these three recommendations are often called “triple X”
Q39. What Is A Pseudo Tty ?
A pseudo tty or false terminal enables external machines to connect through Telnet or rlogin. Without a pseudo tty, no connection can take place.
Q40. What Is Sap ?
Series of interface points that allow other computers to communicate with the other layers of network protocol stack.
Q41. What Is Rip (routing Information Protocol) ?
It is a simple protocol used to exchange information between the routers.
Q42. What Is Silly Window Syndrome ?
It is a problem that can ruin TCP performance. This problem occurs when data are passed to the sending TCP entity in large blocks, but an interactive application on the receiving side reads 1 byte at a time.
Q43. What Are The Important Topologies For Networks ?
BUS topology: In this each computer is directly connected to primary network cable in a single line.
Advantages: Inexpensive, easy to install, simple to understand, easy to extend.
STAR topology: In this all computers are connected using a central hub.
Advantages: Can be inexpensive, easy to install and reconfigure and easy to trouble shoot physical problems.
RING topology: In this all computers are connected in loop.
Advantages: All computers have equal access to network media, installation can be simple, and signal does not degrade as much as in other topologies because each computer regenerates it.
Q44. What Are The Types Of Trmission Media ?
Signals are usually trmitted over some trmission media that are broadly classified in to two categories.
Guided Media: These are those that provide a conduit from one device to another that include twisted-pair, coaxial cable and fiber-optic cable. A signal traveling along any of these media is directed and is contained by the physical limits of the medium. Twisted-pair and coaxial cable use metallic that accept and trport signals in the form of electrical current. Optical fiber is a glass or plastic cable that accepts and trports signals in the form of light.
Unguided Media: This is the wireless media that trport electromagnetic waves without using a physical conductor. Signals are broadcast either through air. This is done through radio communication, satellite communication and cellular telephony.
Q45. What Is Nvt (network Virtual Terminal) ?
It is a set of rules defining a very simple virtual terminal interaction. The NVT is used in the start of a Telnet session.
Q46. What Is Mesh Network ?
A network in which there are multiple network links between computers to provide multiple paths for data to travel.
Q47. What Is Wide-mouth Frog ?
Wide-mouth frog is the simplest known key distribution center (KDC) authentication protocol.
Q48. What Is Terminal Emulation, In Which Layer It Comes
Telnet is also called as terminal emulation. It belongs to application layer.
Q49. What Is Anonymous Ftp And Why Would You Use It
Anonymous FTP enables users to connect to a host without using a valid login and password. Usually, anonymous FTP uses a login called anonymous or guest, with the password usually requesting the user’s ID for tracking purposes only. Anonymous FTP is used to enable a large number of users to access files on the host without having to go to the trouble of setting up logins for them all. Anonymous FTP systems usually have strict controls over the areas an anonymous user can access.
Q50. What Is Proxy Arp ?
It is using a router to wer ARP requests. This will be done when the originating host believes that a destination is local, when in fact is lies beyond router.