Quiz
Chapter 6
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Perguntas do quiz (41)
1Which characteristic of the network layer in the OSI model allows carrying packets for multiple types of communications among many hosts?
- Athe de-encapsulation of headers from lower layers
- Bthe selection of paths for and direct packets toward the destination
- Cthe ability to operate without regard to the data that is carried in each packet
- Dthe ability to manage the data transport between processes running on hosts
2What are two characteristics of IP? (Choose two.)
- Adoes not require a dedicated end-to-end connection
- Boperates independently of the network media
- Cretransmits packets if errors occur
- Dre-assembles out of order packets into the correct order at the receiver end
- Eguarantees delivery of packets
3When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?
- AConnectionless acknowledgements are used to request retransmission.
- BUpper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host.
- CNetwork layer IP protocols manage the communication sessions if connection-oriented transport services are not available.
- DThe best-effort delivery process guarantees that all packets that are sent are received.
4Which field in the IPv4 header is used to prevent a packet from traversing a network endlessly?
- ATIme-to-Live
- BSequence Number
- CAcknowledgment Number
- DDifferentiated Services
5What IPv4 header field identifies the upper layer protocol carried in the packet?
- AProtocol
- BIdentification
- CVersion
- DDifferentiated Services
6What is one advantage that the IPv6 simplified header offers over IPv4?
- Asmaller-sized header
- Blittle requirement for processing checksums
- Csmaller-sized source and destination IP addresses
- Defficient packet handling
7Refer to the exhibit. Which route from the PC1 routing table will be used to reach PC2?
- ADestination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.10.1 192.168.10.10 25 - BDestination Netmask Gateway Interface Metric
127.0.0.1 255.255.255.255 On-Link 127.0.0.1 306 - CDestination Netmask Gateway Interface Metric
192.168.10.0 255.255.255.0 On-Link 192.168.10.10 281 - DDestination Netmask Gateway Interface Metric
192.168.10.0 255.255.255.255 On-Link 192.168.10.10 281
- ADestination Netmask Gateway Interface Metric
8Refer to the exhibit. R1 receives a packet destined for the IP address 192.168.2.10. Out which interface will R1 forward the packet?
- AFastEthernet0/0
- BFastEthernet0/1
- CSerial0/0/0
- DSerial0/0/1
9What type of route is indicated by the code C in an IPv4 routing table on a Cisco router?
- Astatic route
- Bdefault route
- Cdirectly connected route
- Ddynamic route that is learned through EIGRP
10What routing table entry has a next hop address associated with a destination network?
- Adirectly-connected routes
- Blocal routes
- Cremote routes
- DC and L source routes
11Which statement describes a hardware feature of a Cisco 1941 router that has the default hardware configuration?
- AIt does not have an AUX port.
- BIt has three FastEthernet interfaces for LAN access.
- CIt has two types of ports that can be used to access the console.
- DIt does not require a CPU because it relies on Compact Flash to run the IOS.
12Following default settings, what is the next step in the router boot sequence after the IOS loads from flash?
- APerform the POST routine.
- BLocate and load the startup-config file from NVRAM.
- CLoad the bootstrap program from ROM.
- DLoad the running-config file from RAM.
13What are two types of router interfaces? (Choose two.)
- ASVI
- BLAN
- CDHCP
- DTelnet
- EWAN
14Which two pieces of information are in the RAM of a Cisco router during normal operation? (Choose two.)
- ACisco IOS
- Bbackup IOS file
- CIP routing table
- Dbasic diagnostic software
- Estartup configuration file
15A router boots and enters setup mode. What is the reason for this?
- AThe IOS image is corrupt.
- BCisco IOS is missing from flash memory.
- CThe configuration file is missing from NVRAM.
- DThe POST process has detected hardware failure.
16What is the purpose of the startup configuration file on a Cisco router?
- Ato facilitate the basic operation of the hardware components of a device
- Bto contain the commands that are used to initially configure a router on startup
- Cto contain the configuration commands that the router IOS is currently using
- Dto provide a limited backup version of the IOS, in case the router cannot load the full featured IOS
17Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three.)
- Ainterface fastethernet 0/0
- Bline vty 0 4
- Cline console 0
- Denable secret cisco
- Elogin
- Fpassword cisco
18Which characteristic describes an IPv6 enhancement over IPv4?
- AIPv6 addresses are based on 128-bit flat addressing as opposed to IPv4 which is based on 32-bit hierarchical addressing.
- BThe IPv6 header is simpler than the IPv4 header is, which improves packet handling.
- CBoth IPv4 and IPv6 support authentication, but only IPv6 supports privacy capabilities.
- DThe IPv6 address space is four times bigger than the IPv4 address space.
19Open the PT Activity. The enable password on all devices is cisco.
Perform the tasks in the activity instructions and then answer the question.
For what reason is the failure occurring?- APC1 has an incorrect default gateway configured.
- BSW1 does not have a default gateway configured.
- CThe IP address of SW1 is configured in a wrong subnet.
- DPC2 has an incorrect default gateway configured.
20R1 (config)# [blank_start]XXXXXXXXXXXXXXXXX[blank_end]
R1> [blank_start]XXXXXXXXXXXXXXXXX[blank_end]
R1(config-router)# [blank_start]XXXXXXXXXXXXXXXXX[blank_end]
R1# [blank_start]XXXXXXXXXXXXXXXXX[blank_end]
R1(config-line)# [blank_start]XXXXXXXXXXXXXXXXX[blank_end]
R1(config-if)# [blank_start]XXXXXXXXXXXXXXXXX[blank_end]
login
service password-encryption
ip address 192.168.4.4 255.255.255.0
copy running-config startup-config
enable- AXXXXXXXXXXXXXXXXX
- Blogin
- Cservice password-encryption
- Dip address 192.168.4.4 255.255.255.0
- Ecopy running-config startup-config
- Fenable
- G.XXXXXXXXXXXXXXXXX
- H.login
- I.service password-encryption
- J.ip address 192.168.4.4 255.255.255.0
- K.copy running-config startup-config
- L.enable
- M..XXXXXXXXXXXXXXXXX
- Nlogin.
- Oserv pass encrypt
- Pip address
- Qcopy running config starup config
- R..enable
- SXXXXXXXXXXXXXXXXX..
- Tlogin...
- Uservice pass encryption
- Vip address 192.
- Wcopy run config start config
- Xenable...
- YXXXXXXXXXXXX
- Z....login
- AAserv pass encrption
- ABip address 192.168
- ACcopy run config strtup config
- ADenable.....
- AEXXXXXXXXXXX
- AFlogin.....
- AGserv pass-encryption
- AHip address and mask
- AIcopy run-config start config
- AJenable/
21When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?
- Aconnectionless acknowledgements
- Bupper-layer connection-oriented protocols
- CNetwork layer IP protocols
- DTransport layer UDP protocols
22Which IPv4 header field is responsible for defining the priority of the packet?
- Aflow label
- Bflags
- Cdifferentiated services
- Dtraffic class
23 Why is NAT not needed in IPv6?
- ABecause IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.
- BAny host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.
- CThe problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.
- DThe end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet.
24What is a service provided by the Flow Label field of the IPv6 header?
- AIt limits the lifetime of a packet.
- BIt identifies the total length of the IPv6 packet.
- CIt classifies packets for traffic congestion control.
- DIt informs network devices to maintain the same path for real-time application packets.
25How do hosts ensure that their packets are directed to the correct network destination?
- AThey have to keep their own local routing table that contains a route to the loopback interface, a local network route, and a remote default route.
- BThey always direct their packets to the default gateway, which will be responsible for the packet delivery.
- CThey search in their own local routing table for a route to the network destination address and pass this information to the default gateway.
- DThey send a query packet to the default gateway asking for the best route.
26Which two commands can be used on a Windows host to display the routing table? (Choose two.)
- Anetstat -s
- Broute print
- Cshow ip route
- Dnetstat -r
- Etracert
27During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?
- Adiscard the traffic after consulting the route table
- Blook up the next-hop address for the packet
- Cswitch the packet to the directly connected interface
- Danalyze the destination IP address
28A technician is configuring a router that is actively running on the network. Suddenly, power to the router is lost. If the technician has not saved the configuration, which two types of information will be lost? (Choose two.)
- ACisco IOS image file
- Brouting table
- Cbootstrap file
- DARP cache
- Estartup configuration
29Which two interfaces will allow access via the VTY lines to configure the router? (Choose two.)
- Aaux interfaces
- BLAN interfaces
- CWAN interfaces
- Dconsole interfaces
- EUSB interfaces
30Which two files, if found, are copied into RAM as a router with the default configuration register setting boots up? (Choose two.)
- Arunning configuration
- BIOS image file
- Cstartup configuration
- DPOST diagnostics
31When would the Cisco IOS image held in ROM be used to boot the router?
- Aduring a file transfer operation
- Bduring a normal boot process
- Cwhen the full IOS cannot be found
- Dwhen the running configuration directs the router to do this
32After troubleshooting a router, the network administrator wants to save the router configuration so that it will be used automatically the next time that the router reboots. What command should be issued?
- Acopy running-config flash
- Bcopy startup-config flash
- Ccopy running-config startup-config
- Dreload
- Ecopy startup-config running-config
33Which three commands are used to set up a password for a person who attaches a cable to a new router so that an initial configuration can be performed? (Choose three.)
- Ainterface fastethernet 0/0
- Bline vty 0 4
- Cline console 0
- Denable secret cisco
- Elogin
- Fpassword cisco
34Which statement about router interfaces is true? (choose 2)
- ARouter LAN interfaces are not activated by default, but router WAN interfaces are.
- BOnce the no shutdown command is given, a router interface is active and operational.
- CCommands that apply an IP address and subnet mask to an interface are entered in global configuration mode
- DA configured and activated router interface must be connected to another device in order to operate.
35Which command displays a summary chart of all router interfaces, their IP addresses, and their current operational status?
- Ashow ip route
- Bshow version
- Cshow interfaces
- Dshow ip interface brief
36. A technician is manually configuring a computer with the necessary IP parameters to communicate over the corporate network. The computer already has an IP address, a subnet mask, and a DNS server. What else has to be configured for Internet access?
- Athe WINS server address
- Bthe default gateway address
- Cthe MAC address
- Dthe domain name of the organization
37 A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?
- AThe packet will be sent to the default gateway first, and then, depending on the response from the gateway, it may be sent to the destination host.
- BThe packet will be sent directly to the destination host.
- CThe packet will first be sent to the default gateway, and then from the default gateway it will be sent directly to the destination host.
- DThe packet will be sent only to the default gateway.
38A packet leaving PC-1 has to traverse [blank_start]3[blank_end] hops to reach PC-4?
- A3
39Fill in the blank. In a router, [blank_start]ROM[blank_end] is the nonvolatile memory where the diagnostic software, the bootup instructions, and a limited IOS are stored.
- AROM
40Open the PT Activity. Perform the tasks in the activity instructions and then answer the question or complete the task.
Does the router have enough RAM and flash memory to support the new IOS?- AThe router has enough RAM and flash memory for the IOS upgrade.
- BThe router has enough RAM, but needs more flash memory for the IOS upgrade.
- CThe router has enough flash memory, but needs more RAM for the IOS upgrade.
- DThe router needs more RAM and more flash memory for the IOS upgrade.
41Which type of static route that is configured on a router uses only the exit interface?
- Afully specified static route
- Bdefault static route
- Cdirectly connected static route
- Drecursive static route
Informações
- Descrição
- Computer Science Quiz sobre Chapter 6 , criado por Daniel Wygoda em 25-03-2017.
- Autor
- Daniel Wygoda
- Idioma
- English
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