NAT, CDP, LLDP Flashcards
NAT addresses concerns over the dwindling IPv4 address space by _____.
Allowing computers using non-routable address space to communicate with the Internet.
What technique allows for inbound traffic through a NAT?
Port forwarding
The total number of IPv4 addresses is approximately
4.2 billion
What is port forwarding?
allows computers over the Internet to connect to a specific computer or service within a private network
What is Remote desktop connection (RDC)?
a Windows tool that gives a user access to a Windows desktop from anywhere on the Internet.
What is a Public IP address?
identifies a particular device on the public internet
What is a port?
A logical connection that is used by programs and services to exchange information
Without any port forwarding configured, your router?
does not know what to do with this request
What is the range for Private IP addresses?
Class “A” Private IP Address Range
10.0.0.0 to 10.255.255.255
Class “B” Private IP Address Range
172.16.0.0 to 172.31.255.255
Class “C” Private IP Address Range
192.168.0.0 to 192.168.255.255
Class “A” Address Ranges
1.0.0.0 to 126.255.255.255
Class “B” Address Ranges
128.0.0.0 to 191.255.255.255
Class “C” Address Ranges
192.0.0.0 to 223.255.255.255
Loopback IPv4 Address
127.0.0.1
Loopback IPv6 Address
::1
What is APIPA?
The Automatic Private IP Address. APIPA is a mechanism natively incorporated in computers running Microsoft Windows. The idea of such a mechanism is to guarantee that computers still receive an IP address in case of unavailability or failure of a DHCP server. Starts at 169.254 then its apipa
What is CDP and what layer does it operate?
CDP (Cisco Discovery Protocol) is a Layer 2 Cisco proprietary
protocol enabled by default on all Cisco devices. Its purpose is
similar to the purpose of NDP.
CDP can be disabled on specific devices or interfaces for
security reasons.
What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements?
60 seconds hold timer 180 seconds
Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true?
A. CDP is enabled by default and can be disabled globally with the command no cdp run.
A. CDP is enabled by default and can be disabled globally with the command no cdp run
A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. The engineer notices only a single neighbor that uses Cisco Discovery Protocol, but it has several routing neighbor relationships. What would cause the output to show only the single neighbor?
The routers are connected via a Layer 2 switch.
After the implementation of several different types of switches from different vendors, a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. Which vendor-neutral protocol could be used to resolve this issue?
Link Layer Discovery Protocol
While doing network discovery using Cisco Discovery Protocol, it is found that rapid error tracking is not currently enabled. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol?
Cisco Discovery Protocol version 2
