CNT206: Module 17 - Build a Small Network

Why might response times be relevant when making comparisons to network baseline information?

If you see an increase in response times to ping requests over a period of time, this may indicate latency in your network that needs to be addressed

Extended Traceroute; IOS vs. Windows

It allows the administrator to adjust parameters related to the command operation. This is helpful in locating the problem when troubleshooting routing loops, determining the exact next-hop router, or determining where packets are getting dropped or denied by a router or firewall. IOS: traceroute guided, Enter accepts default values Windows: tracert /? to see options not guided, must specify anything you want that's different from default values using options in your command

what 4 factors must you consider when considering the type of intermediary devices that are best to support the network you're building?

cost, speed and types of ports/interfaces, expandability, Operating System features and services

2 ways to accomplish network redundancy

- installing duplicates of equipment, in case of their failure - supplying duplicate network links for critical areas

What 6 things do the fundamental network protocols define

- processes on either end of the communication session - types of messages - syntax of messages - meaning of informational fields - how messages are send and expected responses - interaction with next lower layer

Priority queuing has (how many) queues. The ______ priority is always emptied first

4: High priority, Medium priority, Normal priority, low priority; highest

How many pings are sent when using the ping command on a Windows host? How many are sent from a Cisco IOS device?

4; 5

network baseline & simple method

A baseline that documents the network's current performance level and provides a quantitative basis for identifying abnormal or unacceptable performance. method: copy & paste outputs from ping, traceroute, and other relevant commands to a text file. time stamp them with the date and save into an archive for later comparison

extended ping

An IOS command in which the ping command accepts many other options besides just the destination IP address. You can change the source IP address to not just be the closest interface address to the destination

How to stop of tracert command on Windows host and traceroute on Cisco IOS device

Ctrl-C Ctrl-Shift-6

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

Data Usage

What kind of messages are sent by a Windows host making a tracert? What kind are sent by an IOS or Linux device?

Echo requests, expecting an Echo reply in return UDP message with an invalid port number, expecting an ICMP port unreachable message in return

True or False? It is recommended that you plan, document, and maintain an IP addressing scheme based on device locations.

False; It is recommended that you plan, document, and maintain an IP addressing scheme based on device type. The use of a planned IP addressing scheme makes it easier to identify a type of device and to troubleshoot problems, as for instance, when troubleshooting network traffic issues with a protocol analyzer.

_______ networks require an IT department to maintain, secure, and troubleshoot network devices and to protect organizational data.

Large

_______ networks are managed by a local IT technician or by a contracted professional.

Small

Why may it be advisable for a small business to pay for a second service provider?

Small networks typically provide a single exit point toward the internet via one or more default gateways. If the router fails, the entire network loses connectivity to the internet.

Which software installed on key hosts can reveal the types of network traffic flowing through the network?

Wireshark

U result for ping request

a router along the path responded with an ICMP Type 3 "destination unreachable" error message. Possible reasons include the router does not know the direction to the destination network or it could not find the host on the destination network.

goal for good network design

enhance employee productivity and minimize network downtime

Scaling a network

growing/expanding the network to accommodate for growth in a business/its users

! result for Cisco ping

indicates successful receipt of an echo reply message. It validates a Layer 3 connection between source and destination.

Two forms of software programs or processes that provide access to the network

network applications and application layer services.

network applications vs. application services

network applications are "network aware"; they implement application layer protocols and are able to communicate directly with lower layers of protocol (email clients, web browsers) application layer services are programs that interface with the network and prepare the data for transfer; some applications need the help of these application layer services

4 elements required to scale a network

network documentation - physical and logical topology device inventory - list of devices that user or comprise network budget - itemized IT budget, including fiscal year equipment purchases budget traffic analysis - protocols, applications, and services and their respective traffic requirements should be documented

The _______ command is the most effective way to quickly test Layer 3 connectivity between a source and destination IP address. The command also displays various round-trip time statistics.

ping

extended ping on IPv6

ping IPv6

A good network design will implement _________________ to classify traffic carefully according to priority during times of congestion.

quality of service (QoS)

applications

software programs used to communicate over the network

what tools display how network use is changing

task manager, event viewer, and data usage

fixed configuration device

this kind of networking device has a specific number of ports and types of ports or interfaces, and it can't be expanded

module device

this kind of networking device has expansion slots to add new modules as requirements evolve

. result for Cisco ping request

time expired waiting for an echo reply message. This indicates a connectivity problem occurred somewhere along the path.

Which network protocols make up the fundamental toolset of a network professional?

web: HTTP&HTTPS email: send: SMTP; retrieve: POP3 & IMAP file transfer: FTP & SFTP ip configuration: DHCP domain name resolution: DNS