Chapter 17 Scale To Larger Networks

Ping Indicators

!= means successful layer 3 connection .= means period of time waiting for an echo reply message U= router along the path responded with an ICMP

Network Applications

Applications that implement application layer protocols and are able to communicate directly with the lower layers of the protocol stack.

Which statement is true about CDP on a Cisco device?​

CDP can be disabled globally or on a specific interface

To determine traffic flow patterns, it is important to do the following:

Capture traffic during peak utilization times to get a good representation of the different traffic types Perform the capture on different network segments and devices as some traffic will be local to a particular segment.

What Windows 10 tool is useful to determine which applications are using network services on a host? You got it!

Data Usage

Application Layer Services

For applications that are not network-aware, the programs that interface with the network and prepare the data for transfer.

Which method is used to send a ping message specifying the source address for the ping?

Issue the ping command without specifying a destination IP address.

A network technician issues the C:\> tracert -6 www.cisco.com command on a Windows PC. What is the purpose of the -6 command option?

It forces the trace to use IPv6.

Which elements are required to scale to a larger network? (Choose two.)

Network documentation- physical and logical topology Device inventory- list of devices Budget- costs and budget Traffic analysis- traffic requirements

Reduancy Addon

Redundant Links are present to provide alternate paths in case of a link failure.

six main steps in the troubleshooting process

Step 1. Identify the Problem- find the problem Step 2. Establish a Theory of Probable Causes- establish a theory Step 3. Test the Theory to Determine Cause- test your theories to determine which one is the cause of the problem. Step 4. Establish a Plan of Action and Implement the Solution- establish a plan of action to resolve the problem and implement the solution. Step 5. Verify Solution and Implement Preventive Measures- verify full functionality -If applicable, implement preventive measures. Step 6. Document Findings, Actions, and Outcomes- document your findings, actions, and outcomes.

What is an extended ping

allows an administrator to select specific ping features.

When should an administrator establish a network baseline?

at regular intervals over a period of time

Debug Tool

command is to capture live output for a short period of time

Where are Cisco IOS debug output messages sent by default?

console line

Factors that must be considered when selecting network devices include

cost• speed and types of ports/interfaces• expandability• -Modular devices have expansion slots to add new modules as requirements evolve. operating system features and services

show cdp neighbor command

device username address port capabilities if a switch is laye 2 or layer 3 platform hardware of device example: Cisco 1841 series router

A newly hired network technician is given the task of ordering new hardware for a small business with a large growth forecast. Which primary factor should the technician be concerned with when choosing the new devices?

devies with support for modularity

Data Usage tool

is especially useful to determine which applications are using network services on a host

Delete arp -a MAC and IP Address Information

netsh interface ip delete arpcache

macOS commands

networksetup -listallnetworkservices and the networksetup -getinfo

disable CDP on an interface

no cdp enable

disable CDP

no cdp run

A technician is using the debug ip icmp privileged EXEC command to capture live router output. Which commands would stop this debug command on a Cisco router? (Choose two.)

no debug ip icmp undebug all

A technician has established a remote connection to router R1 to observe debug output. The technician enters the debug ip icmp command then pings a remote destination. However, no output is displayed. Which command would the technician have to enter to display log messages on a remote connection?

terminal monitor