Net+ Misc 1 Flashcards
A router interface references what?
Default gateway
How do you configure client to access network beyond the router?
Use IP address of default gateway;
Most net admins give it lowest host addr in network… 1;
Example: SP4 gateway is 10.0.1.1
Use what kind of network cable to connect two switches requiring a link capable of 10 GB.
Fiber Optic cable
What cable types support the furthest distance when connecting to various MDFs?
Singlemode fiber
What connector type is used in terminating singlemode fiber cable ?
LC… (used for longer runs)
What type connector is used in terminating multimode fiber cables/
ST (short running)
What standards apply to adding devices using multimode (short running) fiber?
1000Base-SR &
10GBase-SR
If a single mode fiber is not providing network connectivity to another remote site, what can you use to test the cable
OTDR…. Optical Time-Domain Reflectometer
What tool would a network tech use to troubleshoot a span of single mode fiber cable?
Sptectrum analyzer
What would be used to connect a singlemode fiber cable to a CAT6 connection
Media converter
What type media converter is used to connect a multimode connection to existing CAT5e
Fiber to Ethernet
What would increase bandwidth over fiber optic by combining multiple signals at different wavelenghts?
DWDM
What layer do you find routers?
Layer 3
What layer do you find switches/
Layer 2
What layer do you find hubs and cabling?
Layer 1
What happens to data as it travels from layer 7 to layer 1 (Application to Presentation)?
Encapsulation
Routers, which use IP addresses to forward data, fall into this layer of the OSI model. If you have an APIPA 169.254.1.1, you would be troubleshooting at this layer?
Layer 3
Switches use MAC addresses to forward data and are used to create VLANs reside in this layer of the OSI model. If you have a NIC issue, this is the layer you troubleshoot.
Layer 2
What device can perform routing functions, support multicast signals and can create VLANs?
Layer 3 Switch
What type of firewall can detect new weird transmissions being sent out of random ports?
Stateful packet inspection firewall
Your router should be able to hold and recognize 4 TB’s of data/programs; but for some reason it only can access 3-TB’s. What should you do?
Firmware update
A spectrum analyzer would be used to measure a span of singlemode fiber optic cables; but what would be used to identify the location of a break in a single singlemode fiber cable?
OTDR
You setup computers in a large industrial setting with lots of running equipment so you want to measure the ‘USABLE’ bandwidth being sent between devices. What are you measuring?
GoodPut
What is a specialized piece of hardware designed to encrypt and decrypt user traffic?
VPN concentrator
You want to implement a firewall, and patch management and group policies and you wish to perform a function to verify the security you have in place. You should do a:
Perform a penetration test
Which two concepts are about avoiding loops in a switch?
802.1d Spanning Tree protocol … Layer 2
What attack utilizes a wireless access point which has been made to look as though it belongs to the network in order to eavesdrop?
Evil Twin
You are told all the companies virtual servers will be hosted internally, but if there is a problem all server images can be found and restored from the cloud using VPN’s?
IaaS
What will allow the company to maintain an Internet presence even in the event that a WAN circuit at one of their sites goes down?
BGP - Border Gateway Protocol
A tech is troubleshooting a newly installed WAP that is sporadically dropping connections to devices on the network. What should the tech check FIRST?
WAP placement
A client is concerned about a hacker compromising a network in order to gain access to confidential research data. Which of the following could be implemented to redirect any attackers on the network?
Honeypot
What helps prevent routing loops?
Split Horizon… at router in layer 3
What should you add (BEST CHOICE) to a business continuity plan in case of a catastrophc event in order to protect the business?
Hot sites or cold sites
A company has seen an increase in ransomware. What should be implemented to reduce the occurrences?
Web content filter
What integrity security tool can help ensure a message arrives intact with the highest level of security?
IPSEC (Internet Protocol Security)
What can you add to a network management tool to help control and use SNMP (Simple Network Mgt Protocol)?
MIB (Mgt Information Base)
DNS is used to help users find the IP addresses for computers and/or websites. If DNS is working but one particular user is having trouble because when they try to go to a specific site they end up somewhere else, then the problem is with the:
Local Hosts file
How many usable hosts/pc’s can you have with 192.168.1.1, 255.255.255.0 (/24)?
254
If you are using 802.11n but you are not getting full speeds, then you should add:
MIMO
Multiple Input Multiple Output
Making decisions based on your examination of a mobile devices security settings and other software settings is know as a:
Posture assessment
Which of the following is a UC application?
Softphone
Name a hybrid routing protocol
EIGRP…
Enhance Interior Gateway Routing Protocol
A tech is concerned about security and is asked to set up a network management protocol which will allow them to access switches and/or routers to get information. What is the protocol?
SNMP
Simple Network Mgt Protocol
How do you block Ping echo requests?
Block ICMP.
Internet Control Message Protocol..
Name servers that can manage authentication
RADIUS & TACACS
If a switch is not sharing VLAN information with another switch, you should consider it might be:
An 802.1q setting
802.1q standard
Networking standard that supports VLANs
What protocol is used to encapsulate other network layer protocols such as multicast and IPX over WAN connections?
GRE
Generic Routing Encapsulation protocol
If you know a data transmission is failing due to frame errors; then you are concerned with what layer?
Layer 2, Data-Link layer
You are told to create a network for testing remote devices. What should you implement?
Quarrantine
You are told to monitor the network to look for users that are trying to access inappropriate websites; so you should use a:
Packet sniffer
After running a point-to-point fiber link between two routers, the interfaces on both will not com up even though you confirm there is power and that cables are working. What is wrong?
There is a wavelength mismatch
Name servers that can manage authentication?
RADIUS
TACACS
If you need to limit broadcast traffic and allow different network segments to communicate, the best option would be:
Add layer-3 switch and create VLAN
What protocol uses label-switching routers (and label-edge routers) for forward traffic?
MPLS… Multiprotocol Label Switching
Which is a HYBRID routing protocol?
EIGRP… Enhanced Interior Gateway Routing Protocol
A company wants to make sure that users are required to authenticate prior to being allowed on the network. What standard accomplishes this?
802.1x… access control standard
Which of the following is a SFP (Small Form-Factor Pluggable) module, often used to connect Singlemode fiber optic cabling?
LC
You are told to block PING echo requests; so you should block:
ICMP… Internet Control Message Protocol
Your 802.11n wireless network is performing about half-speed. What can help 802.11n wireless networks increase/improve speed?
MIMO
Which antenna is small (small footprint) and can be installed quickly/easily on the outside wall?
Patch antenna
If you are dealing with the concepts of two VLANed switches that are connected together and need to share VLAN information, then you must TRUNK them together. What concepts apply to TRUNKING?
802.1q….. VLAN standard for carrying traffic on multipl VLANs on a single trunking interface
VTP….. VLAN Trunking Protocol
What will allow the company to maintain an Internet presence even in the event that a WAN circuit at one of their sites goes down?
BGP… Border Gateway Protocol
The concept that your router has learned the route to all connected networks is:
Convergence
What network management protocol will allow you to access switches and/or routers to get information?
SNMP… Simple Network Management Protocol
What is a specialized piece of hardware designed to encrypt and decrypt user traffic?
VPN concentrator
NIPS
Network Intrusion Prevention System
NIDS
Network Intrusion Detection System
Spanning Tree Protocol prevents loops at what layer?
Layer 2… switch
Split horizon prevents loops what layer?
layer 3… router
Examing devices to make a decision on whether that device should be allowed into your network or allowed access to your network is a:
Posture assessment
A spectrum analyzer would be used to measure a span of singlemode fiber optic cables; but what would be used to identify the location of a break in a single singlemode fiber cable?
OTDR… Optical Time Domain Reflectometer
If you notice too much interference at 2.4 GHz, you should change to:
802.11a and ac
What integrity security tool can help ensure a message arrives intact with the highest level of security?
IPSEC
If you are concerned about your email and web server, concerned the traffic coming in might threaten your internal network, you should setup this:
DMZ
Which of the following is a UC application?
Unified Communications
SOFTPHONE….. an app tha enables VoIP telephone calling
If a switch is not sharing VLAN information with another switch, you should consider it might be:
An 802.1q setting
How many usable hosts/pc’s can you have with 192.168.1.1, 255.255.255.0 (/24)?
254
To define HOW much bandwidth can be used by a protocol on your network is describing the concept of:
Traffic Shaping
What is used to test a span of single-mode fiber cable
SPECTRUM ANALYZER:
If your users are having accessibility problems reaching devices on the cloud, what monitoring tool should you use to locate possible outages?
Network Analyzer
If you want to do an IP-based video conference call on your VoIP, then use:
Codec and SIP
A SAN (Storage Area Network) is used to store backup data for large enterprises to store massive blocks of data. What would be used to backup a Server database (file) that takes up a couple of terabytes of storage space?
NAS
You are told all the company’s virtual servers will be hosted internally, but if there are problems, all server images can be found and restored from the cloud using VPN’s? What is this referred to as?
Public IaaS
IaaS:
Infrastructure as a Service: Hardware needed from cloud (such as Servers and Storage); Applications/OS will be local
PaaS:
Platform as a Service: Only App’s are local; all else run on cloud
SaaS
Software as a Service: Software, OS & Servers run on cloud
Private vs Public data center
Private: Your own virtualized data Center /
Public: Available to anyone
If you see a request that an MX record be created in your DNS, then what MOST likely was recently installed requiring this record?
Mail (Email) Server
Network segmentation (BREAKING NETWORK INTO DIFFERENT SEGMENTS) provides which of the following benefits?
Security (through isolation)
While in the main conference room your wireless is strong; but at your desk the signal keeps dropping. What is MOST likely the issue?
Bounce
Wireless uses CSMA/CA (Collission Avoidance). Wired networks (Ethernet networks that uses cabling like CAT5e/6) use:
CSMA/CD
What device would use CSMA/CA through RTS (Req To Send) protocol?
802.11 Access Point… 802.11ap
Data traveling from Layer 1 (Physical) to Layer 7 (Application) is doing this:
De-encapsulation
Routing prefixes which are assigned in blocks by IANA and distributed by the Regional Internet Registry (RIR) are known as:
ASN… Autonomous system number
When troubleshooting a T1, you can use this to verify communications are reaching the CSU/DSU at the end of a T1?
Loopback plug
A network where people can go to access the internet without disrupting the intranet (internal network) of your office would be a:
Guest network
TROUBLESHOOTING: After adding a new wireless printer a user says he CAN print but can’t reach the internet; even though everyone else can reach the internet; but they CANNOT print to this new printer. What is most likely the issue?
The printer was installed in ad-hoc mode
TROUBLESHOOTING: If you are warned certain network segments are reporting poor performance; what main issue should you consider first?
Packet bottlenecks
TROUBLESHOOTING: You setup a Proxy Server. You then replace your DNS server and now customers are having issues accessing public websits. What will FIX this issue?
Update DNS server with the proxy server information
TROUBLESHOOTING: Your company has two kiosks withing close proximity to multiple other businesses; so the owner is worried about people accessig the internet through the kiosks. What can be implemented so only the employees of your organization are the only ones that can get wireless internet?
MAC Filtering
TROUBLESHOOTING: Users are trying to authenticate to a specific SSID but are unable to. Where will the issue MOST likely reside?
RADIUS server…
Remote Authentication Dial-In User Service
The IP address of the router interface that a switch connects to is referred to as what?
Default Gateway
