Computer Networks Question & Answers July 8, 2021 By WatElectronics This article lists 100+ Computer Network MCQs for engineering students. All the Computer Network Questions & Answers given below includes solution and link wherever possible to the relevant topic. A computer network is a set of communication elements by communication links. Communication elements may be computers, printers, mobile phones, routers, switches, etc whereas the communication links are nothing but the optical fibers, co-axial fibers, twisted pairs, radio, satellite communication, etc. The computer elements can be connected with the help of wireless or wired links. The network supports the way we communicate, think of a traditional landline phone communication, we used to send only the voice data but now the communication pattern has entirely changed. For example, take a mobile application like what’s up, in which we can send text messages, animations, videos, audios, and even voice and video calls which are real-time communication. We can do all this communication seamlessly and perfectly with the help of computer networks. 1). How many types of networks are there? One Two Three Four None Hint 2). How many types of networks are there based on architecture? One Two Three Four None Hint 3). How many types of network topologies are there? One Five Three Four None Hint 4). The OSI model is a _____________ layer architecture One Five Seven Four None Hint 5). The physical layer in an OSI architecture transfers the data in the form of ________ Bits Bytes Both a and b None of the above None Hint 6). In an OSI model architecture which layer transmits the error-free frames? Physical layer Datalink layer Network layer Transport layer None Hint 7). In an OSI model architecture, the packets will be created in ________ layer Physical layer Datalink layer Network layer Transport layer None Hint 8). In an OSI model architecture ____________ layer establish and terminates the sessions Session layer Datalink layer Network layer Transport layer None Hint 9). The data compression, encoding or encryption can be done in ________ layer Session layer Datalink layer Network layer Presentation layer None Hint 10). In which layer the various services will be provided directly to the users? Session layer Datalink layer Application layer Presentation layer None Hint 11). Which layer is a lower in an OSI model architecture? Physical layer Datalink layer Application layer Presentation layer None Hint 12). The physical layer in OSI architecture is responsible for _________ Establishing the connection Maintaining the connection Deactivating the connection All of the above None Hint 13). ____________ is used to regenerate the signal HUB Repeater Bridge None of the above None Hint 14). ____________ is used to send the data packets to all the connected devices HUB Repeater Bridge None of the above None Hint 15). ____________ is used to interconnect the two different LANs in a same protocol HUB Repeater Bridge None of the above None Hint 16). Bridge is used in ________ layer Session layer Datalink layer Application layer Presentation layer None Hint 17). Repeater will be operated in ________ layer Physical layer Datalink layer Application layer Presentation layer None Hint 18). The error checking will be done in _______ HUB Repeater Bridge Switch None Hint 19). _____________ passes the data from one network to another network which are using the different networking models HUB Repeater Bridge Gateway None Hint 20). How many types of routing algorithms are there? One Five Six Four None Hint 21). Which one is a global routing algorithm? Centralized routing algorithm Isolation routing algorithm Distributed routing algorithm None of the above None Hint 22). In which routing algorithm, the routing will be decided based on local information rather than global? Centralized routing algorithm Isolation routing algorithm Distributed routing algorithm None of the above None Hint 23). Non adaptive routing algorithm are classified in ______ ways One Five Six Two None Hint 24). __________ routing algorithm is also known as dynamic routing algorithm Adaptive routing algorithm Non adaptive routing algorithm Both a and b None of the above None Hint 25). __________ routing algorithm is also known as decentralized routing algorithm Centralized routing algorithm Isolation routing algorithm Distributed routing algorithm None of the above None Hint Computer Networks MCQs for Quiz 26). The link-state routing comes under _____ routing algorithm Centralized routing algorithm Isolation routing algorithm Distributed routing algorithm None of the above None Hint 27). Distance vector routing comes under _______ routing algorithm Centralized routing algorithm Isolation routing algorithm Distributed routing algorithm None of the above None Hint 28). The length of IP address in IP version 4 is ________ 8 bits 16 bits 32 bits 64 bits None Hint 29). The adaptive routing algorithms are classified into _________ One Five Three Two None Hint Read more about Routing Algorithm 30). The total length of IP address in IP version 6 is _______ 8 bits 16 bits 32 bits 128 bits None Hint 31). In class A IP address the first 8 bits represent _________ Network ID Host ID Both a and b None of the above None Hint 32). IP address is used to identify the __________ Network ID Host ID Both a and b None of the above None Hint 33). The range of class C IP address is from ________ 0 to 127 128 to 191 192 to 233 None of the above None Hint 34). Which one is an error control protocol? Stop and Wait Go Back N Selective Repeat All of the above None Hint 35). _________ routing algorithm is also static routing algorithm Adaptive routing algorithm Non-adaptive routing algorithm Both a and b None of the above None Hint Read more about Routing Algorithms 36). The range of class B IP address is from ________ 0 to 127 128 to 191 192 to 233 None of the above None Hint 37). How many types of transmission mediums are there? One Five Three Two None Hint 38). Which one is a wired transmission medium? Twisted pair Radio waves Microwaves None of the above None Hint 39). Which one is a wireless or unguided transmission medium? Co-axial Fiber optics Microwaves None of the above None Hint 40). The range of class A IP address is from ________ 0 to 127 128 to 191 192 to 233 None of the above None Hint 41). How many types of twisted pairs are there? One Five Three Two None Hint 42). How many layers are there in TCP/IP models are there? Four Five Three Two None Hint 43). The application layer in TCP/IP model includes __________ protocol TELNET, FTP SMTP DNS All of the above None Hint 44). The transport layer in TCP/IP model includes __________ protocol TCP UDP SMTP All of the above None Hint 45). Which layer is the topmost layer in the TCP/IP model? Transport layer Internet layer Application layer Host to the network layer None Hint 46). The range of class D IP address is from ________ 0 to 127 128 to 191 192 to 233 224 to 239 None Hint 47). The internet layer in TCP/IP model uses ___________ protocol TELNET, FTP SMTP DNS IP None Hint 48). The host to the network layer in TCP/IP model uses ___________ protocol Ethernet Frame relay Token ring All of the above None Hint 49). The TCP/IP model supports ________ service Only connectionless Only connection-oriented Both a and b None of the above None Hint 50). The OSI model supports _______ service Only connectionless Only connection-oriented Both a and b None of the above None Hint Computer Networks MCQs for Engineers 51). The range of class E IP address is from ________ 0 to 127 240 to 255 192 to 233 224 to 239 None Hint 52). In which model both session layer and presentation layers are separately implemented? OSI model TCP/IP model Both a and b None of the above None Hint 53). Which model is a protocol-independent standard? OSI model TCP/IP model Both a and b None of the above None Hint 54). The design issues of the data link layer are ________ It provides services to the network layer It does the operation like framing It also checks the error control and flow control All of the above None Hint 55). The fiber optic cables require a light source with ________ Injection laser diode Light-emitting diode Injection laser or light-emitting diode None of the above None Hint 56). How many types of fiber optics are there? One Five Three Two None Hint 57). What are the advantages of optical fiber? It has greater capacity Small size and lightweight It has lower attenuation problem All of the above None Hint 58). What are the disadvantages of optical fiber? Expensive over short distance Requires highly skilled installers Adding additional nodes is difficult All of the above None Hint Read more about Optical Fiber 59). The coaxial cables are used in _______ Cable television LANs Telephone All of the above None Hint 60). How many types of wired transmission mediums are there? One Five Three Two None Hint 61). __________ is used for multicast communication Radio waves Microwaves Infrared None of the above None Hint 62). Which model is a protocol-dependent standard? OSI model TCP/IP model Both a and b None of the above None Hint 63). __________ is used for unicast communication Radio waves Microwaves Infrared None of the above None Hint 64). What are the benefits of LAN? Improves the IT staff efficiency Better performance It shrinks the broadcast domain All of the above None Hint 65). How many types of VLANs are there? One Five Three Two None Hint Read more about Virtual LAN 66). How many types of layers does the Bluetooth protocol stack have? One Five Three Four None Hint 67). TCP/IP protocol suite or internet protocol is developed by ARPANET? True False None Hint 68). Which is a byte-oriented protocol? Binary synchronous communication protocol Point to point protocol Digital data communications message protocol All of the above None Hint 69). The point to point protocol is a __________ Data link layer protocol Used in broadband communications Used to transport multiprotocol data All of the above None Hint 70). The frame format of the point to point protocol includes _________ Flag, protocol Address, payload Control field, checksum All of the above None Hint 71). How many types of framings are there? One Two Three Four None Hint 72). The framing approaches are of ________types One Two Three Four None Hint 73). Go-Back-N is ________ Less complicated Sorting is not required Most often used All of the above None Hint 74). Which one is a message-oriented protocol? UDP TCP Both a and b None of the above None Hint 75). Which one is a stream-oriented protocol? UDP TCP Both a and b None of the above None Hint Computer Networks MCQs with Hints 76). ______ are the examples of nodes Computer Server Printer All of the above None Hint 77). _________ are the basic characteristics of computer network Fault tolerance Scalability, quality of service Security All of the above None Hint 78). The fault tolerance is the ability of the computer network to __________ Continue working despite failures Ensure no loss of service Both a and b None of the above None Hint 79). The scalability is the ability to __________ Grow based on the needs Have good performance after growth Both a and b None of the above None Hint 80). The quality of service is the ability to ________ Set priorities Manage data traffic to reduce data loss, delay, etc Both a and b None of the above None Hint 81). The security is the ability to prevent ___________ Unauthorized access Misuse Forgery All of the above None Hint 82). The security is the ability to provide __________ Confidentiality Integrity Availability All of the above None Hint 83). The data flow is categorized into ________ types One Two Three Four None Hint 84). The communication in simplex data flow is always __________ Uni-directional Multi-directional Bi-directional None of the above None Hint 85). ___________ is an example of half-duplex data flow Walkie-talkie Keyboards Traditional monitors None of the above None Hint 86). ___________ is an example of full-duplex data flow Walkie-talkie Keyboards Telephone lines None of the above None Hint 87). _____________ are the elements of protocol Message encoding Message formatting and encapsulation Message timing, message size, message delivery option All of the above None Hint 88). How many components does any computer network have? One Two Three Four None Hint 89). A node can ________ Only sends the data Only receives the data Send and receives the data None of the above None Hint 90). The infrared are used for __________ Short-range communication Long-range communication Both a and b None of the above None Hint 91). What are the advantages of bus topology? Less expensive Suited for temporary network Node failures doesn’t affect others All of the above None Hint 92). What are the disadvantages of bus topology? Not fault tolerant Limited cable length No security All of the above None Hint 93). What are the advantages of ring topology? Performance is better than bus topology Can cause bottleneck due to weak links All nodes have equal access All of the above None Hint 94). What are the disadvantages of ring topology? It is unidirectional An increase in load decreases the performance No security All of the above None Hint 95). Which address is needed for our communication? IP address MAC address Both a and b None of the above None Hint 96). The IP addresses are of __________ bits 8 16 32 48 None Hint 97). The MAC addresses are of __________ bits 8 16 32 48 None Hint 98). The IP addresses are represented in _________ format Binary Decimal Hexadecimal None of the above None Hint 99). The MAC addresses are represented in _________ format Binary Decimal Hexadecimal None of the above None Hint 100). The router needs ________ address to forward the data IP address MAC address Both a and b None of the above None Hint Computer Networks Important MCQs 101). The switch needs ________ address to forward the data IP address MAC address Both a and b None of the above None Hint 102). _____________ is an example for IP address 10.10.5.3.6 70-20-80-ED-FC 80-20-90-ED-FC None of the above None Hint 103). _____________ is an example for MAC address 10.10.5.3.6 70-20-80-ED-FC Both a and b None of the above None Hint 104). The switching techniques are classified into ______ types One Two Three Four None Hint 105). The packet switching is categorized into _________ approaches Datagram approach Virtual circuit approach Both a and b None of the above None Hint 106). How many phases does the circuit switching have? One Two Three Four None Hint 107). The datagram packet switching is a _______ switching Connectionless Connection-oriented Both a and b None of the above None Hint 108). The virtual circuit switching is a _______ switching Connectionless Connection-oriented Both a and b None of the above None Hint 109). The advantages of layering are ________ It provides a more modular design It is easy to troubleshoot Both a and b None of the above None Hint 110). What are the services provided by the application layer in an OSI reference model? FTAM Mail services Directory services All of the above None Hint 111). What are the services provided by the presentation layer in an OSI reference model? Translation Encryption Compression All of the above None Hint 112). What are the services provided by the session layer in an OSI reference model? Dialog control Synchronization Both a and b None of the above None Hint 113). What are the services provided by the transport layer in an OSI reference model? Port addressing, segmentation, and reassembly Connection control, end to end flow control Error control All of the above None Hint 114). Which one is an email relating to protocol? BOOTP DHCP SMTP FTP None Hint 115). Which one is a file transfer protocol? FTP TFTP Both a and b None of the above None Hint 116). ____________ are the host configuration protocols FTP, TFTP SMTP, POP, IMAP HTTP BOOTP, DHCP None Hint 117). In TCP/IP model _____ layer determines the best path through the network Internet layer Application layer Transport layer None of the above None Hint 118). What are the services provided by the network layer in an OSI reference model? Logical addressing Routing Both a and b None of the above None Hint 119). The network layer in TCP/IP protocol suite has _______ protocols PPP ( Point to point) Ethernet Interface drivers All of the above None Hint 120). The internet layer in TCP/IP protocol suite has _______ protocols Routing protocols IP support protocols Both a and b None of the above None Hint 121). The application layer in TCP/IP protocol suite has _______ protocols Domain name system, host configuration protocols Email related protocols File transfer protocols All of the above None Hint 122). What is the standard form of PDA? Program Data Unit Protocol Data Unit Process Data Unit None of the above None Hint 123). The application layer in protocol data unit called as _________ Data Segment Packet Frame None Hint 124). The switch operates at ________ layer Data link layer Internet layer Application layer Host to the network layer None Hint 125). The router operates at ________ layer Data link layer Internet layer Network layer Host to the network layer None Hint 126). The switching has _______ Memory Stores MAC address table Stores routing table Both a and b None Hint 127). The router has a _____ Memory Stores routing table Both a and b None of the above None Hint 128). What are the services provided by the data link layer in an OSI reference model? Framing, physical addressing Flow control, error control, and access control Both a and b None of the above None Hint 129). The transport layer in protocol data unit called as _____________ Data Segment Packet Frame None Hint 130). The forwarding decisions in the switch are taken based on the _______ address MAC IP Both a and b None of the above None Hint Computer Network MCQ’s for Interviews 131). The forwarding decisions in the switch are taken based on the _______ address MAC IP Both a and b None of the above None Hint 132). The switch can work in _______ mode Half-duplex Full-duplex Both a and b None of the above None Hint 133). The router works in ________ mode Half-duplex Full-duplex Both a and b None of the above None Hint 134). The switch is a ________ device Local area network Metropolitan area network Wide area network None of the above None Hint 135). The router can be a ________ device Local area network Metropolitan area network Wide area network All of the above None Hint 136). How many types of bridges are there? One Two Three Four None Hint 137). What are the physical components of the copper cable? UTP/STP Coaxial, connectors NICS, ports/interfaces All of the above None Hint 138). ________ are the physical components of fiber optic cable Single mode and multimode fiber Connectors, NICS, and interfaces Lasers and LEDs All of the above None Hint 139). What are the services provided by the physical layer in an OSI reference model? Physical characteristics of the physical media Representation of bits, data rate, synchronization of bits Line configuration, physical topology All of the above None Hint 140). The network layer in protocol data unit called as_________ Data Segment Packet Frame None Hint 141). The copper cable uses ____________ signal Electromagnetic Light signal Both a and b None of the above None Hint 142). The fiber optic cable uses ____________ signal Electromagnetic Light signal Both a and b None of the above None Hint 143). The bandwidth supported by the copper media ranges between _______ 10Mbps-10Gbps 10Mbps-100Gbps 10Mbps-50Gbps None of the above None Hint 144). The bandwidth supported by the fiber optic media ranges between _______ 10Mbps-10Gbps 10Mbps-100Gbps 10Mbps-50Gbps None of the above None Hint 145). The range of copper media is up to __________ 100 meters 50 meters 80 meters 10 meters None Hint 146). The standard Ethernets speeds up to ________ 10 Mbps 20 Mbps 30 Mbps 40 Mbps None Hint 147). The multiple access protocols are categorized into __________ One Two Three four None Hint 148). ____________ are the random access protocols ALOHA, CSMA, CSMA/CA, CSMA/CD Reservation, polling, token passing FDMA, TDMA, CDMA All of the above None Hint 149). ________ are the controlled access protocols ALOHA, CSMA, CSMA/CA, CSMA/CD Reservation, polling, token passing FDMA, TDMA, CDMA All of the above None Hint 150). ____________ are the channelization access protocols ALOHA, CSMA, CSMA/CA, CSMA/CD Reservation, polling, token passing FDMA, TDMA, CDMA All of the above None Hint 151). The ten Gigabit Ethernet speeds up to ___________ 20Gbps 10 Gbps 30 Gbps 40 Gbps None Hint 152). The data link layer in PDU is called as _____ Data Segment Frame Packet None Hint 153). The range of fiber optic media is up to _______ 100,000 meters 100 meters 50 meters 70 meters None Hint 154). The fast Ethernet speeds up to ______ 10 Mbps 20 Mbps 50 Mbps 100 Mbps None Hint 155). In pure ALOHA the time is _____ Continuous Not globally synchronized Globally synchronized Both a and b None Hint 156). In slotted ALOHA the time is ___________ Discrete Not globally synchronized Globally synchronized Both a and c None Hint 157). The maximum efficiency in slotted ALOHA is _______ 20% 10% 38.8% None of the above None Hint 158). The maximum efficiency in pure ALOHA is _______ 20% 18.4% 38.8% None of the above None Hint 159). The gigabit Ethernet speeds up to ________ 1Gbps 50Gbps 10Gbps 100Gbps None Hint 160). The CSMA is classified into _________ One Two Three Four None Hint 161). The protocols involve in noiseless channels are _________ Simplest, stop-and-wait Stop-and-wait ARQ Go-back-N-ARQ None of the above None Hint 162). The protocols involve in noisy channels are _________ Selective repeat Stop-and-wait Go-back-N All of the above None Hint 163). How many types of HDLC frames are there? One Two Three Four None Hint 164). Which frame is an information frame? I-frame U-frame S-frame None of the above None Hint 165). The physical layer in PDU is called as _________ Data Packet Bits Frames None Hint 166). What is the standard form of HDLC? High-Level Data Control High-Data Level Control High-Level Data Link Control None of the above None Hint 167). What is the standard form of SDLC? Simple Data Link Control Synchronous Data Link Control Asynchronous Data Link Control None of the above None Hint 168). The latency is made up of ______ component Transmission delay Propagation delay Queueing delay Processing delay All of the above None Hint 169). The transmission time or transmission delay is equal to __________ Message size divided by bandwidth Distance divided by propagation speed None Hint 170). Which frame is supervisory? I-frame U-frame S-frame None of the above None Hint Computer Networks MCQs for Exams 171). Which frame is unnumbered? I-frame U-frame S-frame None of the above None Hint 172). The propagation time or propagation delay is equal to ___________ Message size divided by bandwidth Distance divided by propagation speed None Hint 173). The network address translation (NAT) categorized into ___________ One Two Three Four None Hint 174). What is the standard form of ISDN? Integrated Services Digital Network Interface Services Digital Network Integrated Simple Digital Network None of the above None Hint 175). What is the standard form of DWDM? Digital Wavelength Dense Multiplexing Dense Wavelength Digital Multiplexing Digital Wavelength Digital Multiplexing None of the above None Hint 176). How many types of leased line connections are there? One Two Three Four None Hint 177). The multiprotocol label Switching is __________ Scalable Protocol independent Both a and b None of the above None Hint 178). _________ are the types of coaxial cable? RG58 RG59 RG6 All of the above None Hint 179). How many types of fibers are there? One Two Three Four None Hint 180). The multimode fiber uses ________ to transmit the light Infrared LED system Laser diode arrangement Both a and b None of the above None Hint 181). The single-mode fiber uses ________ to transmit the light Infrared LED system Laser diode arrangement Both a and b None of the above None Hint 182). Which one is a type of fiber optic cabling connector? Subscriber connector Straight trip, mechanical transfer registered jack Local connector All of the above None Hint Read more about Optical Fibers 183). Which fiber optic cabling connector is a push-pull type of connector? Subscriber connector Straight trip, mechanical transfer registered jack Local connector All of the above None Hint 184). Which fiber optic cabling connector is a twist lock type of connector? Subscriber connector Straight trip Local connector All of the above None Hint 185). The local connector is a type of fiber optic cabling connector, it is also known as ___________ Lucent connector Little connector Both a and b None of the above None Hint 186). Which one is used to remove the insulating cover on cables and wires? Crimpers Wire strippers Pushdown tool All of the above None Hint 187). How many types of IPV4 network transmissions are there? One Two Three Four None Hint 188). Which one is a type of one-to-one communication? Unicast Multicast Broadcast All of the above None Hint 189). Which one is a type of one-to-few communication? Unicast Multicast Broadcast All of the above None Hint 190). Which one is a type of one-to-all communication? Unicast Multicast Broadcast All of the above None Hint 191). How many strategies does token passing have? One Two Three Four None Hint 192). What are the rules of ALOHA? Any station could transmit the data at any time There will be collisions possible Retransmits the data All of the above None Hint 193). The efficiency of the stop-and-wait control is __________ 1/1+2a 1/1-2a 1+2a None of the above None Hint 194). The efficiency of the sliding window protocol is __________ N/1+2a 1/1-2a 1+2a None of the above None Hint 195). The efficiency of the TDM is __________ N/1+2a 1/1+a 1+2a None of the above None Hint 196). The efficiency of the CSMA/CD is __________ N/1+2a 1/1+a 1/1+6.4a None of the above None Hint 197). The efficiency of the early token reinsertion is __________ N/1+2a 1/1+a 1/1+(a/N) None of the above None Hint 198). The efficiency of the delay token reinsertion is __________ N/1+2a 1/1+a 1/1+(a/N)(N+1) None of the above None Hint 199). _________ are the flow control methods TDM, CSMA/CD, polling Stop and wait Sliding window protocol All of the above None Hint 200). What is the standard form of CSMA/CD? Carrier Sensing Multiple Access Collision Detection Carrier Sensing Multiple Access Carrier Detection Carrier Single Multiple Access Collision Detection None of the above None Hint Time's up
