R4RIN – MCQs, Mock Tests | MCA Computer Network MCA Question MCQ Set 10

Which of the following are Gigabit Ethernets?

1. 1000 BASE-SX
2. 1000 BASE-LX
3. 1000 BASE-CX
4. all of the mentioned

✅ Correct Answer: 4

_____ is a collective term for a number of Ethernet Standards that carry traffic at the nominal rate of 1000 Mbit/s against the original Ethernet speed of 10 Mbit/s.

1. Ethernet
2. Fast Ethernet
3. Gigabit Ethernet
4. Gigabyte Ethernet

✅ Correct Answer: 2

______ is another kind of fiber optic network with an active star for switching.

1. S/NET
2. SW/NET
3. NET/SW
4. FS/NET

✅ Correct Answer: 1

What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?

1. 14
2. 15
3. 16
4. 30

✅ Correct Answer: 4

You need to subnet a network into 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?

1. 255.255.255.192
2. 255.255.255.224
3. 255.255.255.240
4. 255.255.255.248

✅ Correct Answer: 2

You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask?

1. 2
2. 3
3. 4
4. 5

✅ Correct Answer: 4

If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what would be the valid subnet address of this host?

1. 172.16.112.0
2. 172.16.0.0
3. 172.16.96.0
4. 172.16.255.0

✅ Correct Answer: 1

You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to the router interface?

1. 6
2. 8
3. 30
4. 32

✅ Correct Answer: 1

What is the subnet id of a host with an IP address 172.16.66.0/21?

1. 172.16.36.0
2. 172.16.48.0
3. 172.16.64.0
4. 172.16.0.0

✅ Correct Answer: 3

The network address of 172.16.0.0/19 provides how many subnets and hosts?

1. 7 subnets, 30 hosts each
2. 8 subnets, 8,190 hosts each
3. 8 subnets, 2,046 hosts each
4. 7 subnets, 2,046 hosts each

✅ Correct Answer: 2

Which type of Ethernet framing is used for TCP/IP and DEC net?

1. Ethernet 802.3
2. Ethernet 802.2
3. Ethernet II
4. Ethernet SNAP

✅ Correct Answer: 3

Consider a situation in which you are a system administrator on a NetWare network, you are running NetWare 4.11 and you cannot communicate with your router. What is the likely problem?

1. NetWare 4.11 defaults to 802.2 encapsulation
2. NetWare 4.11 defaults to 802.3 encapsulation
3. Cisco routers only work with NetWare 3.11
4. NetWare 3.11 defaults to 802.2 encapsulation

✅ Correct Answer: 1

NetWare IPX addressing uses a network number and a node number. Which statement is not true?

1. The network address is administratively assigned and can be up to 16 hexadecimal digits long
2. The node address is always administratively assigned
3. The node address is usually the MAC address
4. If the MAC address is used as the node address, then IPX eliminates the use of ARP

✅ Correct Answer: 2

Which NetWare protocol works on layer 3–network layer—of the OSI model?

1. IPX
2. NCP
3. SPX
4. NetBIOS

✅ Correct Answer: 1

Which NetWare protocol provides link-state routing?

1. NLSP
2. RIP
3. SAP
4. NCP

✅ Correct Answer: 1

As a system administrator, you want to debug IGRP but are worried that the “debug IP IGRP transaction” command will flood the console. What is the command that you should use?

1. Debug IP IGRP event
2. Debug IP IGRP-events
3. Debug IP IGRP summary
4. Debug IP IGRP events

✅ Correct Answer: 4

What does the following series of commands “Router IGRP 71 network” accomplish? 10.0.0.0 router IGRP 109 network 172.68.7.0

1. It isolates networks 10.0.0.0 and 172.68.7.0
2. It loads IGRP for networks 109 and 71
3. It disables RIP
4. It disables all routing protocols

✅ Correct Answer: 1

The “IPX delay number” command will allow an administrator to change the default settings. What are the default settings?

1. For LAN interfaces, one tick; for WAN interfaces, six ticks
2. For LAN interfaces, six ticks; for WAN interfaces, one tick
3. For LAN interfaces, zero ticks; for WAN interfaces, five ticks
4. For LAN interfaces, five ticks; for WAN interfaces, zero Ticks

✅ Correct Answer: 1

As a system administrator, you need to set up one Ethernet interface on the Cisco router to allow for both sap and Novell-ether encapsulations. Which set of commands will accomplish this?

1. Interface Ethernet 0.1 IPX encapsulation Novell-ether IPX network 9e interface Ethernet 0.2 IPX network 6c
2. Interface Ethernet 0 IPX encapsulation Novell-ether IPX network 9e interface Ethernet 0 IPX encapsulation sap IPX network 6c
3. Interface Ethernet 0.1 IPX encapsulation Novell-ether interface Ethernet 0.2 IPX encapsulation sap
4. Interface Ethernet 0.1ipx encapsulation Novell-ether IPX network 9e interface Ethernet 0.2 IPX encapsulation sap IPX network 6c

✅ Correct Answer: 4

What does the “IPX maximum-paths 2” command accomplish?

1. It enables load sharing on 2 paths if the paths are equal metric paths
2. It sets up routing to go to network 2
3. It is the default for Cisco IPX load sharing
4. It enables load sharing on 2 paths if the paths are unequal metric paths

✅ Correct Answer: 1

You want to enable both arpa and snap encapsulation on one router interface. How do you do this?

1. The interface can handle multiple encapsulation types with no extra configuration
2. Assign two network numbers, one for each encapsulation type
3. Enable Novell-ether to run multiple encapsulation types
4. Both arpa and snap are enabled by default so you don’t have to configure anything

✅ Correct Answer: 2

To prevent Service Advertisements (SAPs) from flooding a network, Cisco routers do not forward them. How are services advertised to other networks?

1. Each router builds its own SAP table and forwards that every 60 seconds
2. Each router assigns a service number and broadcasts that
3. SAPs aren’t necessary with Cisco routers
4. Cisco routers filter out all SAPs

✅ Correct Answer: 1

Novell’s implementation of RIP updates routing tables every _________ seconds.

1. 60
2. 90
3. 10
4. 30

✅ Correct Answer: 1

In Novell’s use of RIP, there are two metrics used to make routing decisions. Select the correct metrics.

1. Ticks & Hops
2. Hops & Loops
3. Loops & Counts
4. Counts & Ticks

✅ Correct Answer: 1

Which routing protocol has a maximum network diameter (hop count) of 15?

1. RIPv1
2. RIPv2
3. EIGRP
4. Both RIPv1 and RIPv2

✅ Correct Answer: 4

How often does a RIPv1 router broadcast its routing table by default?

1. Every 30 seconds
2. Every 60 seconds
3. Every 90 seconds
4. RIPv1 does not broadcast periodically

✅ Correct Answer: 1

Which command displays RIP routing updates?

1. Show IP route
2. Debug IP rip
3. Show protocols
4. Debug IP route

✅ Correct Answer: 2

Two connected routers are configured with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?

1. The updated information will be added to the existing routing table Debug IP rip
2. The update will be ignored and no further action will occur Debug IP route
3. The updated information will replace the existing routing table entry
4. The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence

✅ Correct Answer: 2

You type debug IP rip on your router console and see that 172.16.10.0 is being advertised to you with a metric of 16. What does this mean?

1. The route is 16 hops away Debug IP rip
2. The route has a delay of 16 microseconds Debug IP route
3. The route is inaccessible
4. The route is queued at 16 messages a second

✅ Correct Answer: 3

Default administrative distance of a static route is ________

1. 0
2. 90
3. 100
4. 1

✅ Correct Answer: 4

Which protocol gives a full route table update every 30 seconds?

1. IEGRP
2. RIP
3. ICMP
4. IP

✅ Correct Answer: 2

_______ is the default administrative distance of RIP.

1. 0
2. 90
3. 120
4. 130

✅ Correct Answer: 3

Which statement is true regarding classless routing protocol?

1. The use of discontinuous networks is not allowed
2. Use of variable length subnet masks is permitted
3. RIPv1 is a classless routing protocol
4. IGRP supports classes routing within the same autonomous system

✅ Correct Answer: 2

Where should we use default routing?

1. On stub networks- which have only one exit path out of the network
2. Which have more than one exit path out of the network
3. Minimum five exit paths out of the network
4. Maximum five exit paths out of the network

✅ Correct Answer: 1

Which statement is true regarding classless routing protocols?

1. The use of discontinuous networks is not allowed
2. The use of variable length subnet masks is permitted
3. RIPv1 is a classless routing protocol
4. RIPv2 supports classless routing

✅ Correct Answer: 2

What is route poisoning?

1. It sends back the protocol received from a router as a poison pill, which stops the regular updates. The use of variable length subnet masks is permitted
2. It is information received from a router that can’t be sent back to the originating router.RIPv2 supports classless routing
3. It prevents regular update messages from reinstating a route that has just come up
4. It describes when a router sets the metric for a downed link to infinity

✅ Correct Answer: 4

Which of the following is true regarding RIPv2?

1. It has a lower administrative distance than RIPv1
2. It converges faster than RIPv1
3. It has the same timers as RIPv1
4. It is harder to configure than RIPv1

✅ Correct Answer: 3

Which of the situations might not require multiple routing protocols in a network?

1. When a new Layer 2-only switch is added to the network
2. When you are migrating from one routing protocol to another
3. When you are using routers from multiple vendors
4. When there are host-based routers from multiple vendors

✅ Correct Answer: 1

Which two routing protocols can be redistributed into OSPF by a Cisco router?

1. IP EIGRP and AppleTalk EIGRP
2. AppleTalk EIGRP and RIPv2
3. RIPv2 and IP EIGRP
4. RIPv2 and IP EIGRP

✅ Correct Answer: 3

Which is a reason for avoiding doing route redistribution on two routers between the same two routing domains?

1. Higher cost of two routers
2. Routing feedback
3. Cisco IOS incompatibility
4. Not possible to use two routers

✅ Correct Answer: 2

What does administrative distance rank?

1. Metrics
2. Sources of routing information
3. Router reliability
4. Best paths

✅ Correct Answer: 2

Which protocol maintains neighbor adjacencies?

1. RIPv2 and EIGRP
2. IGRP and EIGRP
3. RIPv2
4. EIGRP

✅ Correct Answer: 3

Which routing protocol implements the diffusing update algorithm?

1. IS-IS
2. IGRP
3. EIGRP
4. OSPF

✅ Correct Answer: 3

In cryptography, what is cipher?

1. algorithm for performing encryption and decryption
2. encrypted message
3. both algorithm for performing encryption and decryption and encrypted message
4. decrypted message

✅ Correct Answer: 1

In asymmetric key cryptography, the private key is kept by _____

1. sender
2. receiver
3. sender and receiver
4. all the connected devices to the network

✅ Correct Answer: 2

Which one of the following algorithm is not used in asymmetric-key cryptography?

1. rsa algorithm
2. diffie-hellman algorithm
3. electronic code book algorithm
4. dsa algorithm

✅ Correct Answer: 3

In cryptography, the order of the letters in a message is rearranged by ______

1. transpositional ciphers
2. substitution ciphers
3. both transpositional ciphers and substitution ciphers
4. quadratic ciphers

✅ Correct Answer: 1

What is data encryption standard (DES)?

1. block cipher
2. stream cipher
3. bit cipher
4. byte cipher

✅ Correct Answer: 1

Cryptanalysis is used ______

1. to find some insecurity in a cryptographic scheme
2. to increase the speed
3. to encrypt the data
4. to make new ciphers

✅ Correct Answer: 1

Which one of the following is a cryptographic protocol used to secure HTTP connection?

1. stream control transmission protocol (SCTP)
2. transport layer security (TLS)
3. explicit congestion notification (ECN)
4. resource reservation protocol

✅ Correct Answer: 2