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CCNA 200-301 > Network Fundementals > Flashcards

Network Fundementals Flashcards

1
Q

When a frame that enters a switch fails the frame check sequence, which two interface counters are incremented?

A

Input Errors & CRC

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2
Q

Which 802.11 frame type is Association Response?

A

Management

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3
Q

In which way does spine-and-leaf architecture allow for scalability in a network when additional access ports are required?

A

A leaf switch can be added with connections to every spine switch.

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4
Q

What identifies the functionality of virtual machines?

A

The hypervisor virtualizes physical components including CPU, memory & storage.

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5
Q

Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface?

A

IPv6 address autoconfig

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6
Q

When configuring IPv6 on an interface, which two IPv6 multicast groups are joined?

A

FF02::1 & FF02::2

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7
Q

Which network allows devices to communicate without the need to access the internet?

A

172.28.0.0 (CLASS B)

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8
Q

Which IPv6 address type provides communication between subnets and cannot route on the internet?

A

Unique local

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9
Q

Which IPv6 address block sends packets to a group address rather than a single address?

A

FF00::/8 is used for multicast

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10
Q

What action is taken by switch port enabled for PoE power classification override?

A

If a monitored port exceeds the maximum administrative value for power, the port is shutdown and err-disabled.

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11
Q

What occurs to frames during the process of frame flooding?

A

Frames are sent to every port on the switch in the same VLAN expect from the originating port.

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12
Q

Which function does the range of private IPv4 address perform?

A

Allows multiple companies to each use the same address without conflicts.

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13
Q

What are two descriptions of three-tier network topologies?

A

The distribution layer runs Layer 2 and Layer 3 technologies;
The network core is designed to maintain continuous connectivity when device fails.

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14
Q

Which type of IPv6 address is publicly routable in the same way as IPv4 public addresses?

A

Global Unicast

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15
Q

What is a characteristic of spine-and-leaf architecture?

A

Each device is separated by the same number of hops.

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16
Q

A device detects two stations transmitting frames at the same time. This condition occurs after the first 64 bytes of the frame is received. Which interface counter increments?

A

late collision

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17
Q

A wireless administrator has configured a WLAN; however, the clients need access to a less congested 5-GHz network for their voice quality. Which action must be taken to meet the requirement?

A

enable Band Select

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18
Q

For what two purposes does the Ethernet protocol use physical addresses?

A

to uniquely identify devices at Layer 2;
to allow detection of a remote device when its physical address is unknown

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19
Q

What are two benefits of private IPv4 IP addresses?

A

They are less costly than public IP addresses.
They can be assigned to devices without Internet connections.

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20
Q

Which two goals reasons to implement private IPv4 addressing on your network?

A

Conserve IPv4 address.
Reduce the risk of a network security breach.

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21
Q

Which WAN access technology is preferred for a small office / home office architecture?

A

broadband cable access

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22
Q

Which two options are the best reasons to use an IPV4 private IP space?

A

to enable intra-enterprise communication.
to conserve global address space.

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23
Q

Which function is performed by the collapsed core layer in a two-tier architecture?

A

enforcing routing policies.

24
Q

What is the primary function of a Layer 3 device?

A

to pass traffic between different networks.

25
Q

Which two functions are performed by the core layer in a three-tier architecture?

A

Provide uninterrupted forwarding service.
Ensure timely data transfer between layers.

26
Q

What is a recommended approach to avoid co-channel congestion while installing access points that use the 2.4 GHz frequency?

A

different nonoverlapping channels

27
Q

What are two functions of a Layer 2 switch?

A

moves packets within a VLAN.
makes forwarding decisions based on the MAC address of a packet.

28
Q

Which networking function occurs on the data plane?

A

forwarding remote client/server traffic

29
Q

What is a role of access points in an enterprise network?

A

connect wireless devices to a wired network.

30
Q

How does a Cisco Unified Wireless Network respond to Wi-Fi channel overlap?

A

It analyzes client load and background noise and dynamically assigns a channel.

31
Q

In which situation is private IPv4 addressing appropriate for a new subnet on the network of an organization?

A

There is limited unique address space, and traffic on the new subnet will stay local within the organization.

32
Q

Which network action occurs within the data plane?

A

compare the destination IP address to the IP routing table.

33
Q

Which two network actions occur within the data plane?

A

Add or remove an 802.1Q trunking header.
Match the destination MAC address to the MAC address table.

34
Q

Why was the RFC 1918 address space defined?

A

To conserve public IPv4 addressing

35
Q

What is an appropriate use for private IPv4 addressing?

A

on hosts that communicate only with other internal hosts

36
Q

What is a requirement for nonoverlapping Wi-Fi channels?

A

discontinuous frequency ranges

37
Q

A network engineer is installing an IPv6-only capable device. The client has requested that the device IP address be reachable only from the internal network. Which type of IPv6 address must the engineer assign?

A

link-local address

38
Q

What are two characteristics of an SSID?

A

It uniquely identifies an access point in a WLAN.
It provides secured access to a WLAN.

39
Q

What is the collapsed layer in collapsed core architectures?

A

Core and distribution

40
Q

What are the two functions of SSIDs?

A

uses the maximum of 32 alphanumeric characters.
supports a single access point.

41
Q

Which two characteristics describe the access layer in a three-tier network architecture?

A

physical connection point for a LAN printer.
layer at which a wireless access point connects to the wired network.

42
Q

Which PoE mode enables powered-devices detection and guarantees power when the device detected?

A

Auto

43
Q

What are two reasons to deploy private addressing on a network?

A

to subnet addresses in an organized hierarchy.
to segment local IP addresses from the global routing table.

44
Q

Which property is shared by 10GBase-SR and 10GBase-LR interfaces?

A

Both require fiber cable media for transmission.

45
Q

Which action is taken by the data plane within a network device?

A

Forwards traffic to the next hop.

46
Q

What is the function of the control plane?

A

It exchanges routing table information.

47
Q

Which two cable types must be used to connect an access point to the WLC when 2.5-Gbps and 5-Gbps upload speeds are required?

A

10GBASE-T
Cat 5e

48
Q

Which key function is provided by the data plane?

A

Forwarding traffic to the next hop.

49
Q

A client experiences slow throughput from a server that is directly connected to the core switch in a data center. A network engineer finds minimal latency on connections to the server, but data transfers are unreliable, and the output of the show interfaces counters errors command shows a high FCS-Err count on the interface that is connected to the server. What is the cause of the throughput issue?

A

a physical cable fault.

50
Q

What is the difference between 1000BASE-LX/LH and 1000BASE-ZX interfaces?

A

1000BASE- LX/LH is supported on links up to 10km, and 1000Base-ZX operates over links up to 70 km.

51
Q

What are two reasons to implement IPv4 private addressing on a network?

A

To provide protection from external denial-of-service attacks.
To conserve global unique IPv4 addresses.

52
Q

Which concern is addressed with the use of private IPv4 addressing?

A

Lack of available publicly routable unique IPv4 address.

53
Q

What is the path for traffic sent from one user workstation to another workstation on a separate switch in a three-tier architecture model?

A

access; distribution; core; distribution; access

54
Q

Which WAN topology provides a combination of simplicity quality, and availability?

A

point-to-point.

55
Q

How are the switches in a spine-and-leaf topology interconnected?

A

Each leaf switch is connected to each spine switch.

CCNA 200-301 (2 decks)

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