What is the function of the planning and provisioning team within the ISP organization?
answer
Identifying whether existing network hardware and circuits are available
question
What are two characteristics of a scalable network?
answer
Grows in size without impacting existing users.
Contains modular devices that allow for expansion
question
Why do multiple ISP's connect to an IXP or a NAP?
answer
To gain access to each other's networks.
To access the internet backbone
question
A network administrator can successfully ping the server at www.cisco.com, but cannot ping the company web server located at the ISP in another city. Which tool or command would help identify the specific router where the packet was lost or delayed?
answer
Traceroute
question
What makes it possible for email to be sent and received on a wide variety of devices, including cell phones, PDA's, laptop and desktop computers?
answer
Email software is written using standards and protocols that ensure compatibility.
question
Which connectivity option would be a good choice for a large university with three campus locations in the same major city?
answer
Metro Ethernet
question
What is the function provided by Tier 3 Internet Service Providers?
answer
Connects individuals and small businesses to the internet.
question
Why do small businesses and individuals choose DSL and cable connectivity instead of T3 connections?
answer
T3 connections are usually more expensive than DSL or cable options.
question
Transport Layer
answer
Packages data in segments for transmission, Uses UDP for realtime data streaming, adds port numbers
question
Network Layer
answer
Routes packets between networks, encapsulates data in packets for transmission, adds IP addresses to data packets.
question
Using a systematic troubleshooting approach, a help desk technician suspects a problem at Layer 4 of the OSI model. What two questions could be asked to isolate the problem to layer 3?
answer
Is your PC configured for DHCP?
Can you ping your default gateway?
question
A customer call has been escalated to an on-site technician because the level 1 and 2 technicians could not determine the problem. Which three tasks would be performed by the on-site technician?
answer
Replace faulty cables or connections.
Correct PC network settings and run any necessary utilities
Swap out suspected faulty hardware with good known hardware.
question
Which two actions should be taken after a customer problem is resolved by the ISP help desk?
answer
Document the solution in the trouble ticket or work order.
Copy the solution into a knowledge-base document for future reference.
question
What are common causes of physical network connectivity problems?
answer
Ethernet cable plugged into wrong port.
Faulty Ethernet Cable
question
Physical Layer
answer
Twisted Pair Cable
Repeaters
question
Data Link Layer
answer
Mac Addresses
Switching
question
Network Layer
answer
IP address
Routing
question
What two tasks should an on-site tech perform before beginning any troubleshooting or repair at the customer site?
answer
Review trouble ticket with the customer to verify the information is correct.
Provide Identification, including name and place of employment
question
What does a successful ping response from teh 127.0.0.1 loopback address on a host indicate?
answer
The TCP/IP stack loaded correctly.
question
What range of addresses is referred to as link-local addresses?
answer
169.254.0.0/16
question
What three types of network documentation does a tech need to complete before designing a new network?
answer
Inventory Sheet, Site survey report, topology maps
question
What should the on-site tech do immediately after completing the site survey?
answer
Review the survey results with the customer to ensure accuracy
question
Which three steps must be completed before implementation of the new network can begin?
answer
Prototypes are created and tested. An analysis report is generated.
The design is approved by the customer.
question
Which two are characteristics of horizontal cabling?
answer
It terminates at the face plate in teh user work area.
It terminates at a patch panel in the IDF and MDF.
question
When designing a structured cable project, why is it important to obtain an accurate floor plan?
answer
To identify possible wiring closet locations.
To avoid areas with electrical equipment or wiring.
To estimate how much cable will be required.
question
Vertical Cable
answer
Cable from IDF to MDF in the organization's backbone area
question
cable-containment system
answer
A series of trays and straps used to guide and protect cable runs
question
Patch Cable
answer
Short cable from the computer to the wall plate in the user work area.
question
Horizontal Cable
answer
Cable from the wall plate to the IDF in the distribution area.
question
Why is it important to consider the size of failure domains when upgrading a network?
answer
Small failure domains reduce the number of users affected when a network device malfunctions.
question
Why would a managed-service customer want to have an SLA with the ISP?
answer
To have a written agreement of what services the ISP will provide.
question
Where would the on-site tech record information about the brand, model, and operating system of the hosts and networking devices installed on the network?
answer
Inventory Sheet
question
An ISP is recommending a CISCO 1841 ISR to upgrade a small business customer LAN. Why is an ISR a good choice for a small business customer?
answer
An ISR often costs less than a stand alone router and a LAN switch solution.
ISRs combine routing, switching, and wireless capabilities in a single device.
question
Which three addresses are valid subnetwork addresses when 172.25.15.0/24 is further subnetted by borrowing an additional four bits ?
answer
172.25.15.0
172.25.15.16
172.25.15.96
question
What are three advantages of NAT?
answer
Conserves registered public IP addresses.
Hides private LAN addressing from the Internet.
Permits LAN expansion without additional public IP addresses.
question
What is teh default subnet mask for the address 172.31.18.222?
answer
255.255.0.0
question
what are the high order binary numbers that begin with a Class C address?
answer
110
question
Host A is configured with IP address 192.168.75.34 and Host B is cfonfigured with IP address 192.168.75.50. Each are using the same subnet mask of 255.255.255.240 but are not able to ping each other. What networking device is needed for these hosts to communicate?
answer
Router
question
What two pieces of information can be derived from the IP address 192.168.42.135/24?
answer
This is a Class C address because the high order bits are 110.
The default subnet mask is 255.255.255.0
question
What subnet mask is indicated by the network address 172.16.4.8/18
answer
255.255.192.0
question
When a network admin applies the subnet mask 255.255.255.248 to a Class B address for any given subnet, how many IP addresses are available to be assigned to devices?
answer
6
question
An ISP customer has obtained a Class C network address. The network tech needs to create five usbale subnets, with each subnet capable of containing at least 20 host addresses. What is the appropriate subnet mask to use?
answer
255.255.255.224
question
What concept is used to reduce router table complexity by aggregating multiple network addresses?
answer
Supernetting
question
When configuring an ISR device using Cisco SDM Express Wizard, what does setting the Enable Secret Password field accomplish?
answer
Controls Access to privileged mode.
question
When using Cisco SDM, which WAN encapsulation type can be configured to require a username and password before connection is grated?
answer
Point-to-Point protocol (PPP)
question
What speed and duplex setting will result on a Catalyst Switch if it is set to auto-negotiate speed and duplex and is connected to a 100 Mbps port on a device that does not support auto-negotiation?
answer
100 half duplex
question
Which method can be used to configure a Cisco Catalyst Switch before an IP address has been applied to the management interface?
answer
Cisco IOS CLI using console port.
question
What is a secure way that a client can connect to a device in-band for the purpose of remote monitoring and administration?
answer
SSH
question
Which type of wide area network (WAN) connection uses packet switched networks?
answer
Frame Relay
question
A small company with two offices in the same building is requesting advice on WAN connections. Which two questions would give a tech information to base a recommendation?
answer
How much money has the customer budgeted to spend on the WAN connection?
Are the company web servers located in the building or at the ISP?
question
What is one fundamental difference between Cisco's CLI versus the SDM interface?
answer
The CLI interface can be used with both in-band and out-of-band management.
question
Which two statements describe the command history feature?
answer
It displays the most recently entered command strings in the current mode.
It can be accessed by using the up and down arrow keys.
question
Which router mode displays a prompt of Router#?
answer
Privileged EXEC mode
question
In which two cases would out-of-band management of a router be required?
answer
To access and configure the router before the IP network is operational.
To correct an error that has shutdown the network interfaces on a router.
question
What are two statements that describe the result of entering the: ip route 0.0.0.0.0.0.0.0 192.168.1.1 command on a router?
answer
A default static route is added to the routing table.
If a route to a destination network is not known, the packet is sent to 192.168.1.1
Used by administrator to verify or monitor router operation?
answer
Show interfaces
Show Ip route
ping
question
Affects the operation of the network?
answer
no shutdown
ip address 172.16.1.1 255.255.255.0
question
What is the purpose of assigning an IP address to the interface VLAN1 on the cisco switch?
answer
To be able to to telnet the switch to manage and configure it.
question
Router Bootup process
answer
Perform POST
Load the bootstrap program
locate the IOS
load the IOS
locate the configuration file
load the configuration file/enter setup mode.
question
What are two characteristics of interior routers?
answer
Use IGP routing protocols
Exchange local routes.
question
What are two methods used to allow remote networkds to be added to a routing table?
answer
Entered by an administrator
Learned through a routing protocol
question
Where does the router get information about the best path to send a packet destined for a host located on a remote network?
answer
From the routing table stored in RAM
question
What two statements are true about transit traffic?
answer
Transit traffic can overload an internet router.
Transit traffic travels through an AS to reach a remote AS.
question
A customer router is configured to use BGP to exchange routes with a directly connected neighbor router. What is identified by the remote AS number in the command : neighbor 209.165.201.1 remote-as 200?
answer
The directly connected router AS number.
question
A new network is to be configured on a router. Which tasks must be completed to configure this interface and implement dynamic IP routing for the new network?
answer
Select the routing protocol to be configured
Assign an IP address and subnet mask to the interface
Configure the routing protocol with the new network IP address.
question
What is the purpose of the network command used in the configuration of the RIP routing protocol?
answer
It specifies which interfaces will exchange RIP routing updates.
question
Show running-config
answer
displays current configuration information for configured routing protocols and interfaces
question
Show interfaces
answer
Checks to see that the interfaces are up and operational
question
Debug ip rip
answer
displays the networks advertised in the updates as the updates are sent and received.
question
Show ip protocols
answer
Verifies the routing protocol process running and that the correct networks are advertised.
question
Show ip route
answer
verifies that routes received are installed in the routing table
question
A network engineer is configuring a new router. The interfaces have been configured with IP addresses but no routing prtocols or static routes have been configured yet. What routes are present in the routing table?
answer
Direct connections
question
What tasks are completed by routing protocols?
answer
Learning the available routes to all destinations.
Placing the best route in teh routing table
Removing routes from the routing table when they are no longer valid.
question
Which network devices are used in the internet to route traffic between autonomous systems?
answer
Border Gateway routers
question
What is an example of a routing protocol used to exchange information between autonomous systems?
answer
BGP
question
Which layer of the four-layer TCP/IP model encapsulates datagrams for transmission on physical media?
answer
Network access
question
Which three application-layer protocols use UDP as the transport protocol?
answer
DNS
SNMP
TFTP
question
Which two protocols define how an e-mail client retrieves mail from the server?
answer
IMAP SMTP
question
An e-mail client connection downloads all messages and then deletes them from the e-mail server. Which type of client connection does this by default?
answer
POP3
question
Within FTP, which connection type closes automatically when the file transfer is complete?
answer
Data transfer process
question
What DNS zone resolves fully qualified domain names to IP addresses using a local DNS server?
answer
Forward Lookup
question
What are two common DNS lookup methods?
answer
Using ISP-caching DNS servers
Using a DNS server located on company premises.
question
TCP
answer
Guaranteed delivery
Breaks data into segments
retransmits lost data
question
UDP
answer
does not require acknowledgments
connectionless
unreliable
question
An IP packet arrives at a server addressed to TCP port 21. Which application-layer service is the destination of this packet?
answer
FTP
question
Why is it important for the source and destination hosts to synchronize sequence numbers during the TCP three-way handshake?
answer
So both hosts can keep track of the segments sent and acknowledged.
To identify lost segments that must be retransmitted.
question
What command can an administrator issue to find the filename of the IOS that is currently running before backing up the IOS to a TFTP server?
answer
Show Flash
question
While downloading an IOS image from a TFTP server, an admin sees long strings of the letter 'e' output to the console. What does this mean?
answer
The router is erasing the flash memory.
question
Which term describes the ability of a web server to keep a log of the users who access the server, as well as the length of time they use it?
answer
Accounting
question
Two statements that describe out-of-band network management?
answer
Used for initial device configuration
uses a direct console connection
question
What two are duties of an SNMP management agent?
answer
Reports to the management station by responding to polls.
Sends an alert message to the management station if a threshold is exceeded.
question
What is the "principle of least privilege"?
answer
Give each user access to only those resources needed to do his/her job.
question
Authentication
answer
Username and password
question
Accounting
answer
Who used what network resource
question
Authorization
answer
Rights to a specific network resource.
question
When MPLS is configured on a router, what is true about the MTU?
answer
The MTU size on a LAN interface must be manually increased using the mpls mtu command.
question
The CEO of Quickclips, INC. decides that the company's backup process needs to allow for a very quick restoration of lost data. He is willing to accept a lengthier time for the back up process itself. Which type of backup should be implemented?
answer
FULL
question
Where is the safest place to store backups?
answer
Offsite secure facility
question
Which firewall filtering technology keeps track of the actual communication process occurring between the source and destination devices and stores it in a table?
answer
Stateful Filtering
question
Why would a business choose an IPS instead of an IDS?
answer
An IPS identifies and blocks malicious activity
An IDS cannot stop some malicious traffic from getting through.
question
Digital Multimeter
answer
Checks power-supply voltage levels and verifies that network devices are receiving power.
question
Network Management System
answer
Graphically displays a physical view of network devices and can locate the source of a failed device.
question
Network Analyzer
answer
Identifies devices producing the most network traffic, analyzes network traffic by protocol, and views interface details.
