Computer Architecture And Organization Set 8

Computer Science Engineering (CSE)

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This set of Computer Architecture and Organization Multiple Choice Questions & Answers (MCQs) focuses on Computer Architecture And Organization Set 8

Q1 | A subset of a network that includes all the routers but contains no loops is called
  • spanning tree
  • spider structure
  • spider tree
  • special tree
Answer: spanning tree
Explaination:
spanning tree protocol (stp) is a network protocol that creates a loop free logical topology for ethernet networks. it is a layer 2 protocol that runs on bridges and switches. the main purpose of stp is to
Q2 | Which one of the following algorithm is not used for congestion control?
  • traffic aware routing
  • admission control
  • load shedding
  • routing information protocol
Answer: routing information protocol
Explaination:
the routing information protocol (rip) is used by the network layer for the function of dynamic routing.
Q3 | The network layer protocol for internet is
  • ethernet
  • internet protocol
  • hypertext transfer protocol
  • file transfer protocol
Answer: internet protocol
Explaination:
there are several protocols used in network layer. some of them are ip, icmp, clnp, arp, ipx, hrsp etc.
Q4 | ICMP is primarily used for                      
  • error and diagnostic functions
  • addressing
  • forwarding
  • routing
Answer: error and diagnostic functions
Explaination:
icmp abbreviation for internet control message protocol is used by networking devices to send error messages and operational information indicating a host or router cannot be reached. icmp operates over the ip packet to provide error reporting
Q5 | Which type of Ethernet framing is used for TCP/IP and DEC net?
  • ethernet 802.3
  • ethernet 802.2
  • ethernet ii
  • ethernet snap
Answer: ethernet ii
Explaination:
the ethernet 802.3 framing is used for netware versions 2 to 3.11, and the ethernet 802.2 framing is used for netware versions 3.12 and later plus osi routing, ethernet ii is used with tcp/ip and dec net, and ethernet snap is used with tcp/ip and appletalk. the type field in ethernet 802.2 frame is replaced by a length field in ethernet 802.3.
Q6 | 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?
  • netware 4.11 defaults to 802.2 encapsulation
  • netware 4.11 defaults to 802.3 encapsulation
  • cisco routers only work with netware 3.11
  • netware 3.11 defaults to 802.2 encapsulation
Answer: netware 4.11 defaults to 802.2 encapsulation
Explaination:
the default encapsulation on cisco routers is novell ethernet_802.3 and netware 3.12and later defaults to 802.2 encapsulation, 3.11 and earlier defaults to 802.3.
Q7 | NetWare IPX addressing uses a network number and a node number. Which statement is not true?
  • the network address is administratively assigned and can be up to 16 hexadecimal digits long
  • the node address is always administratively assigned
  • the node address is usually the mac address
  • if the mac address is used as the node address, then ipx eliminates the use of arp
Answer: the node address is always administratively assigned
Explaination:
the network address can be up to 16 hexadecimal digits in length. the node number is 12 hexadecimal digits. the node address is usually the mac address. an example ipx address is 4a1d.0000.0c56.de33. the network part is 4a1d. the node part is 0000.0c56.de33. the network number is assigned by the system administrator of the novell network and the mac address/node address is not assigned by the administrator.
Q8 | Which NetWare protocol works on layer 3– network layer—of the OSI model?
  • ipx
  • ncp
  • spx
  • netbios
Answer: ipx
Explaination:
ipx (internetwork packet exchange) is the netware network layer 3 protocol used for transferring information on lans that use novell’s netware.
Q9 | Which NetWare protocol provides link- state routing?
  • nlsp
  • rip
  • sap
  • ncp
Answer: nlsp
Explaination:
netware link services protocol (nlsp) provides link-state routing.
Q10 | 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?
  • debug ip igrp event
  • debug ip igrp-events
  • debug ip igrp summary
  • debug ip igrp events
Answer: debug ip igrp events
Explaination:
the “debug ip igrp events” is used to display a short summary of igrp routing information. you can append an ip address onto either console’s command-line to see only the igrp updates from a neighbor. the command will only give a short summary and hence won’t flood the command line.
Q11 | 0.0.0 router IGRP 109 network 172.68.7.0
  • it isolates networks 10.0.0.0 and 172.68.7.0
  • it loads igrp for networks 109 and 71
  • it disables rip
  • it disables all routing protocols
Answer: it isolates networks 10.0.0.0 and 172.68.7.0
Explaination:
it isolates network 10.0.0.0 and
Q12 | 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?
  • interface ethernet 0.1 ipx encapsulation novell-ether ipx network 9e interface ethernet 0.2 ipx network 6c
  • interface ethernet 0 ipx encapsulation novell-ether ipx network 9e interface ethernet 0 ipx encapsulation sap ipx network 6c
  • interface ethernet 0.1 ipx encapsulation novell-ether interface ethernet 0.2 ipx encapsulation sap
  • interface ethernet 0.1ipx encapsulation novell-ether ipx network 9e interface ethernet 0.2 ipx encapsulation sap ipx network 6c
Answer: interface ethernet 0.1ipx encapsulation novell-ether ipx network 9e interface ethernet 0.2 ipx encapsulation sap ipx network 6c
Explaination:
the following commands setup the sub interfaces to allow for two types of encapsulation:interface ethernet 0.1 ipx encapsulation novell-ether ipx network 9e interface ethernet0.2 ipx encapsulation sap ipx network 6c.
Q13 | What does the “IPX maximum-paths 2” command accomplish?
  • it enables load sharing on 2 paths if the paths are equal metric paths
  • it sets up routing to go to network 2
  • it is the default for cisco ipx load sharing
  • it enables load sharing on 2 paths if the paths are unequal metric paths
Answer: it enables load sharing on 2 paths if the paths are equal metric paths
Explaination:
it enables load sharing on 2 paths if the paths are equal metric paths. the default is 1 path and the maximum is 512 paths. the value must always be greater than 1 and must be a natural number.
Q14 | You want to enable both arpa and snap encapsulation on one router interface. How do you do this?
  • the interface can handle multiple encapsulation types with no extra configuration
  • assign two network numbers, one for each encapsulation type
  • enable novell-ether to run multiple encapsulation types
  • both arpa and snap are enabled by default so you don’t have to configure anything
Answer: assign two network numbers, one for each encapsulation type
Explaination:
to assign multiple network numbers, you usually use sub interfaces. a sample configuration follows: ipxethernet
Q15 | By default, Cisco routers forward GNS SAPs to remote networks.
  • false
  • true
Answer: false
Explaination:
gns is novell’s protocol to get nearest server. if there is a server on the local network,that server will respond. if there isn’t, the cisco router has to be configured to forward thegns sap.
Q16 | To prevent Service Advertisements (SAPs) from flooding a network, Cisco routers do not forward them. How are services advertised to other networks?
  • each router builds its own sap table and forwards that every 60 seconds
  • each router assigns a service number and broadcasts that
  • saps aren’t necessary with cisco routers
  • cisco routers filter out all saps
Answer: each router builds its own sap table and forwards that every 60 seconds
Explaination:
cisco routers build sap tables and forward the table every 60 seconds. all saps can’t befiltered even with 4.x since nds and time synchronization uses saps.
Q17 | Novell’s implementation of RIP updates routing tables every                    seconds.
  • 60
  • 90
  • 10
  • 30
Answer: 60
Explaination:
novell’s rip updates routing tables every 60 seconds, apple’s rtmp is every 10 seconds, routers arp every 60 seconds, igrp signal every 90 seconds, and banyan vines signals every 90 seconds.
Q18 | In Novell’s use of RIP, there are two metrics used to make routing decisions. Select the correct metrics.
  • ticks & hops
  • hops & loops
  • loops & counts
  • counts & ticks
Answer: ticks & hops
Explaination:
it first uses ticks (which is about 1/18 sec.); if there is a tie, it uses hops; if hops are equal, then it uses an administratively assigned tiebreaker.
Q19 | The term that is used to place packet in its route to its destination is called                      
  • delayed
  • urgent
  • forwarding
  • delivering
Answer: forwarding
Explaination:
forwarding is done by the nodes in the path from source to destination, that are not the intended destination for the packet in order to pass the packet to the next node in the path. the destination machine does not forward the packet to any other node.
Q20 | A second technique to reduce routing table and simplify searching process is called
  • network-specific method
  • network-specific motion
  • network-specific maintaining
  • network-specific membership
Answer: network-specific method
Explaination:
in the network specific forwarding method, there is only one record, the destination of the packet, in the routing table and not the other hosts of the network. the other two forwarding methods are the default method and the next-hop method.
Q21 | Next-Hop Method is used to reduce contents of a                    
  • revolving table
  • rotating table
  • routing table
  • re-allocate table
Answer: routing table
Explaination:
in the next-hop forwarding method, the routing table of each router in the path contains the address of only the next hop in the path of packet. this method is suitable for short distances only.
Q22 | In Unicast routing, if instability is between three nodes, stability cannot be                  
  • stable
  • reversed
  • guaranteed
  • forward
Answer: guaranteed
Explaination:
in unicast routing, there is only sender and one receiver. so, if there is instability between three nodes, in which one is sender, one is receiver and one is the router in the path, there is no other path available for the packet and the stability of the network is not guaranteed.
Q23 | RPF stands for                      
  • reverse path forwarding
  • reverse path failure
  • reverse packet forwarding
  • reverse protocol failure
Answer: reverse path forwarding
Explaination:
reverse path forwarding is a loop-free forwarding method for multi-cast routing in modern systems. the method focuses on forwarding the packet away from the source ip in each iteration to make sure there is no loops.
Q24 | LSP stands for                      
  • link stable packet
  • link state packet
  • link state protocol
  • link state path
Answer: link state packet
Explaination:
a link state packet is a packet created by a router that lists its neighboring nodes and routers in link state routing protocol. it is shared with other routers to find the shortest path from a source to the destination.
Q25 | Protocol is a set of
  • formats
  • procedures
  • formats & procedures
  • none of the mentioned
Answer: formats & procedures
Explaination:
protocol is a set of procedures and formats that entities use to communicate information.
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