Chapter 11: Building A Small Network
Which statement is true about Cisco IOS ping indicators?
'U' may indicate that a router along the path did not contain a route to the destination address and that the ping was unsuccessful.
Which two steps are required before SSH can be enabled on a Cisco router? (Choose two.)
1) Generate a set of secret keys to be used for encryption and decryption. 2) Give the router a host name and domain name.
Some routers and switches in a wiring closet malfunctioned after an air conditioning unit failed. What type of threat does this situation describe?
Environmental
What is the purpose of issuing the commands cd nvram: then dir at the privilege exec mode of a router?
To list the content of the NVRAM
Which command will backup the configuration that is stored in NVRAM to a TFTP server?
copy startup-config tftp
How should traffic flow be captured in order to best understand traffic patterns in a network?
during peak utilization times
Which firewall feature is used to ensure that packets coming into a network are legitimate responses initiated from internal hosts?
Stateful packet inspection
A network technician issues the arp -d * command on a PC after the router that is connected to the LAN is reconfigured. What is the result after this command is issued?
The ARP cache is cleared.
A network technician is investigating network connectivity from a PC to a remote host with the address 10.1.1.5. Which command, when issued on a Windows PC, will display the path to the remote host?
tracert 10.1.1.5
Electrical threats can include?
voltage spikes
Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer? (Choose two.)
1) Capture traffic during peak utilization times to get a good representation of the different traffic types. 2) Perform the capture on different network segments.
A network administrator for a small company is contemplating how to scale the network over the next three years to accommodate projected growth. Which three types of information should be used to plan for network growth? (Choose three.)
1) Documentation of the current physical and logical topologies. 2) Analysis of the network traffic based on protocols, applications, and services used on the network. 3) Inventory of the devices that are currently used on the network
Which two actions can be taken to prevent a successful network attack on an email server account? (Choose two.)
1) Never send the password through the network in a clear text 2) Limit the number of unsuccessful attempts to log in to the server.
Which two traffic types require delay sensitive delivery? (Choose two.)
1) Voice 2) Video
On which two interfaces or ports can security be improved by configuring executive timeouts? (Choose two.)
1) console ports 2) vty ports
A network administrator is issuing the login block-for 180 attempts 2 within 30 command on a router. Which threat is the network administrator trying to prevent?
A user who is trying to guess a password to access the router
When should an administrator establish a network baseline?
At regular intervals over a period of time
Which statement is true about CDP on a Cisco device?
CDP can be disabled globally or on a specific interface.
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?
Devices with support for modularity.
Which type of network threat is intended to prevent authorized users from accessing resources?
DoS attacks
What is considered the most effective way to mitigate a worm attack?
Download security updates from the operating system vendor and patch all vulnerable systems.
A small company has only one router as the exit point to its ISP. Which solution could be adopted to maintain connectivity if the router itself, or its connection to the ISP, fails?
Have a second router that is connected to another ISP.
What is the purpose of using SSH to connect to a router?
It allows a secure remote connection to the router command line interface.
What is the purpose of the network security authentication function?
To require users to prove who they are.
hardware threats can cause?
PHYSICAL DAMAGE
Network services use: _______________________ to define a set of rules that govern how devices communicate and the data formats used in a network.
PROTOCOL
Which network design consideration would be more important to a large corporation than to a small business?
Redundancy
Which command will block login attempts on RouterA for a period of 30 seconds if there are 2 failed login attempts within 10 seconds?
RouterA(config)# login block-for 30 attempts 2 within 10
A network administrator for a small campus network has issued the show ip interface brief command on a switch. What is the administrator verifying with this command?
The status of the switch interfaces and the address configured on interface vlan 1.
What type of traffic would most likely have the highest priority through the network?
VOICE
__________________________ defines the protocols and technologies that implement the transmission of voice data over an IP network.
VoIP
Show __________________________ command provides information about the amount of free nvram and flash memory with the permissions for reading or writing data.
file systems
What is one of the most effective security tools available for protecting users from external threats?
firewalls
A particular website does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
ipconfig /displaydns
Which element of scaling a network involves identifying the physical and logical topologies?
network documentation
maintenance threats can include?
poor handling of key electrical componenets
An administrator wants to back up a router configuration file to a USB drive that is connected to the router. Which command should the administrator use to verify that the USB drive is being recognized by the router?
show file systems
The ____________________________ command that is issued on a router is used to verify the value of the software configuration register.
show version
Environmental threats can include?
temperature extremes