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TINFO250 > Module 8-10 > Flashcards

Module 8-10 Flashcards

1
Q

Which information is used by routers to forward a data packet toward its destination?

A

destination IP address

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2
Q

A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?

A

The packet will be sent directly to the destination host.

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2
Q

Which statement describes a feature of the IP protocol?

A

IP relies on upper layer services to handle situations of missing or out-of-order packets.

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2
Q

Why is NAT not needed in IPv6?​

A

Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.​

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2
Q

A router receives a packet from the Gigabit 0/0 interface and determines that the packet needs to be forwarded out the Gigabit 0/1 interface. What will the router do next?

A

create a new Layer 2 Ethernet frame to be sent to the destination

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2
Q

Which IPv4 address can a host use to ping the loopback interface?

A

127.0.0.1

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2
Q

A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem?

A

The computer has an invalid default gateway address.

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2
Q

Which parameter does the router use to choose the path to the destination when there are multiple routes available?

A

the lower metric value that is associated with the destination network

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3
Q

What are two services provided by the OSI network layer? (Choose two.)

A

routing packets toward the destination

encapsulating PDUs from the transport layer

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4
Q

Within a production network, what is the purpose of configuring a switch with a default gateway address?

A

The default gateway address is used to forward packets originating from the switch to remote networks.

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5
Q

What is a basic characteristic of the IP protocol?

A

connectionless

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6
Q

Which field in the IPv4 header is used to prevent a packet from traversing a network endlessly?

A

Time-to-Live

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7
Q

What is one advantage that the IPv6 simplified header offers over IPv4?

A

efficient packet handling

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8
Q

What IPv4 header field identifies the upper layer protocol carried in the packet?

A

Protocol

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9
Q

What information does the loopback test provide?

A

The TCP/IP stack on the device is working correctly.

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10
Q

What routing table entry has a next hop address associated with a destination network?

A

remote routes

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11
Q

How do hosts ensure that their packets are directed to the correct network destination?

A

They 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.​

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12
Q

When transporting data from real-time applications, such as streaming audio and video, which field in the IPv6 header can be used to inform the routers and switches to maintain the same path for the packets in the same conversation?

A

Flow Label

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13
Q

What statement describes the function of the Address Resolution Protocol?

A

ARP is used to discover the MAC address of any host on the local network.

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14
Q

Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)

A

The frame has the broadcast address as the destination address.

The destination address is unknown to the switch.

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15
Q

Which statement describes the treatment of ARP requests on the local link?

A

They are received and processed by every device on the local network.

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15
Q

Which destination address is used in an ARP request frame?

A

FFFF.FFFF.FFFF

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16
Q

A network technician issues the arp -d * command on a PC after the router that is connected to the LAN is reconfigured. What is the result after this command is issued?

A

The ARP cache is cleared

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16
Q

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

A

The switch will forward the frame to all ports except port 4.

17
Q

Which two types of IPv6 messages are used in place of ARP for address resolution?

A

neighbor solicitation

neighbor advertisement

18
Q

What is the aim of an ARP spoofing attack?

A

to associate IP addresses to the wrong MAC address

19
Q

Refer to the exhibit. PC1 attempts to connect to File_server1 and sends an ARP request to obtain a destination MAC address. Which MAC address will PC1 receive in the ARP reply?

A

the MAC address of the G0/0 interface on R1

20
Q

Where are IPv4 address to Layer 2 Ethernet address mappings maintained on a host computer?

A

ARP cache

21
Q

What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward?

A

destination MAC address

22
Q

A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?

A

Exit privileged EXEC mode and press Enter.

23
Q

A router boots and enters setup mode. What is the reason for this?

A

The configuration file is missing from NVRAM

23
Q

What are two functions of NVRAM? (Choose two.)

A

to retain contents when power is removed

to store the startup configuration file

24
Q

The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?

A

The switch can be remotely managed from a host on another network.

24
Q

What is the effect of using the Router# copy running-config startup-config command on a router?

A

The contents of NVRAM will change.

25
Q

What happens when the transport input ssh command is entered on the switch vty lines?

A

Communication between the switch and remote users is encrypted.

25
Q

Which two functions are primary functions of a router? (Choose two.)

A

packet forwarding

path selection

25
Q

Which three commands are used to set up secure access to a router through a connection to the console interface? (Choose three.)

A

line console 0

login

password cisco

25
Q

What will happen if the default gateway address is incorrectly configured on a host?

A

The host cannot communicate with hosts in other networks.

26
Q

What are two potential network problems that can result from ARP operation? (Choose two.)

A

On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays.

Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic.

27
Q

Which term describes a field in the IPv4 packet header used to identify the next level protocol?

A

protocol

28
Q

Which term describes a field in the IPv4 packet header that contains an 8-bit binary value used to determine the priority of each packet?

A

differentiated services

29
Q

Which term describes a field in the IPv4 packet header used to detect corruption in the IPv4 header?

A

header checksum

29
Q

Which term describes a field in the IPv4 packet header that contains a 32-bit binary value associated with an interface on the sending device?

A

source IPv4 address

29
Q

RTR1(config)# interface gi0/1
RTR1(config-if)# description Connects to the Marketing LAN
RTR1(config-if)# ip address 10.27.15.17 255.255.255.0
RTR1(config-if)# no shutdown
RTR1(config-if)# interface gi0/0
RTR1(config-if)# description Connects to the Payroll LAN
RTR1(config-if)# ip address 10.27.14.148 255.255.255.0
RTR1(config-if)# no shutdown
RTR1(config-if)# interface s0/0/0
RTR1(config-if)# description Connects to the ISP
RTR1(config-if)# ip address 10.14.15.254 255.255.255.0
RTR1(config-if)# no shutdown
RTR1(config-if)# interface s0/0/1
RTR1(config-if)# description Connects to the Head Office WAN
RTR1(config-if)# ip address 203.0.113.39 255.255.255.0
RTR1(config-if)# no shutdown
RTR1(config-if)# end

Refer to the exhibit. A network administrator is connecting a new host to the Payroll LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

A

10.27.14.148

30
Q

Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?

A

destination IPv4 address

30
Q

Which term describes a field in the IPv4 packet header used to limit the lifetime of a packet?

A

TTL

30
Q

Which term describes a field in the IPv4 packet header that contains a 4-bit binary value set to 0100?

A

version

30
Q

What property of ARP causes cached IP-to-MAC mappings to remain in memory longer?

A

Entries in an ARP table are time-stamped and are purged after the timeout expires.

30
Q

What property of ARP allows hosts on a LAN to send traffic to remote networks?

A

Local hosts learn the MAC address of the default gateway.

30
Q

What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table?

A

A static IP-to-MAC address entry can be entered manually into an ARP table.

31
Q

Floor(config)# interface gi0/1
Floor(config-if)# description Connects to the Registrar LAN
Floor(config-if)# ip address 192.168.235.234 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface gi0/0
Floor(config-if)# description Connects to the Manager LAN
Floor(config-if)# ip address 192.168.234.114 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface s0/0/0
Floor(config-if)# description Connects to the ISP
Floor(config-if)# ip address 10.234.235.254 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface s0/0/1
Floor(config-if)# description Connects to the Head Office WAN
Floor(config-if)# ip address 203.0.113.3 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# end

Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

A

192.168.235.234

31
Q

What property of ARP forces all Ethernet NICs to process an ARP request?

A

The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.

32
Q

What property of ARP causes the NICs receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process?

A

The type field 0x806 appears in the header of the Ethernet frame.

33
Q

What property of ARP causes a reply only to the source sending an ARP request?

A

The source MAC address appears in the header of the Ethernet frame.

33
Q

What property of ARP causes the request to be flooded out all ports of a switch except for the port receiving the ARP request?

A

The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.

34
Q

BldgA(config)# interface gi0/1
BldgA(config-if)# description Connects to the Medical LAN
BldgA(config-if)# ip address 192.168.191.189 255.255.255.0
BldgA(config-if)# no shutdown
BldgA(config-if)# interface gi0/0
BldgA(config-if)# description Connects to the Client LAN
BldgA(config-if)# ip address 192.168.190.70 255.255.255.0
BldgA(config-if)# no shutdown
BldgA(config-if)# interface s0/0/0
BldgA(config-if)# description Connects to the ISP
BldgA(config-if)# ip address 10.190.191.254 255.255.255.0
BldgA(config-if)# no shutdown
BldgA(config-if)# interface s0/0/1
BldgA(config-if)# description Connects to the Head Office WAN
BldgA(config-if)# ip address 198.51.100.213 255.255.255.0
BldgA(config-if)# no shutdown
BldgA(config-if)# end

Refer to the exhibit. A network administrator is connecting a new host to the Medical LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

A

192.168.191.189

35
Q

Floor(config)# interface gi0/1
Floor(config-if)# description Connects to the Registrar LAN
Floor(config-if)# ip address 192.168.225.223 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface gi0/0
Floor(config-if)# description Connects to the Manager LAN
Floor(config-if)# ip address 192.168.224.103 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface s0/0/0
Floor(config-if)# description Connects to the ISP
Floor(config-if)# ip address 10.224.225.254 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# interface s0/0/1
Floor(config-if)# description Connects to the Head Office WAN
Floor(config-if)# ip address 203.0.113.246 255.255.255.0
Floor(config-if)# no shutdown
Floor(config-if)# end

Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

A

192.168.225.223

35
Q

HQ(config)# interface gi0/1
HQ(config-if)# description Connects to the Branch LAN
HQ(config-if)# ip address 172.19.99.99 255.255.255.0
HQ(config-if)# no shutdown
HQ(config-if)# interface gi0/0
HQ(config-if)# description Connects to the Store LAN
HQ(config-if)# ip address 172.19.98.230 255.255.255.0
HQ(config-if)# no shutdown
HQ(config-if)# interface s0/0/0
HQ(config-if)# description Connects to the ISP
HQ(config-if)# ip address 10.98.99.254 255.255.255.0
HQ(config-if)# no shutdown
HQ(config-if)# interface s0/0/1
HQ(config-if)# description Connects to the Head Office WAN
HQ(config-if)# ip address 209.165.200.120 255.255.255.0
HQ(config-if)# no shutdown
HQ(config-if)# end

Refer to the exhibit. A network administrator is connecting a new host to the Store LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

A

172.19.98.230

36
Q

Main(config)# interface gi0/1
Main(config-if)# description Connects to the Service LAN
Main(config-if)# ip address 192.168.167.166 255.255.255.0
Main(config-if)# no shutdown
Main(config-if)# interface gi0/0
Main(config-if)# description Connects to the Engineering LAN
Main(config-if)# ip address 192.168.166.46 255.255.255.0
Main(config-if)# no shutdown
Main(config-if)# interface s0/0/0
Main(config-if)# description Connects to the ISP
Main(config-if)# ip address 10.166.167.254 255.255.255.0
Main(config-if)# no shutdown
Main(config-if)# interface s0/0/1
Main(config-if)# description Connects to the Head Office WAN
Main(config-if)# ip address 198.51.100.189 255.255.255.0
Main(config-if)# no shutdown
Main(config-if)# end

Refer to the exhibit. A network administrator is connecting a new host to the Service LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

A

192.168.167.166

TINFO250 (6 decks)

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