Which information can IP filtering technologies use to make packet-forwarding decisions?(Select three.)
source IP address
destination IP address
port address
Which option in the Microsoft NOS periodically checks for software patches and upgrades via the Internet?
Windows Update
Which list contains only specific types of DoS attacks
Ping of Death, TCP SYN, Teardrop, and Smurf
Which Red Hat Linux utility allows an administrator to either select DHCP IP configuration, or to specify a static IP address along with the associated netmask, gateway, and primary nameserver?
netconfig
In Linux, what is the first program that takes control of the boot process from the BIOS?
LILO
On a Linux server, which file is usually the best place to locate error messages that have been generated but not displayed on screen?
system log
Which statement is true about the use of passwords in the Linux operating system?
Passwords are case sensitive.
What is the term given to a group of independent computers working together as a single system?
cluster
While booting a Linux server, the booting process stopped and the 'LIL-' error code was displayed. What does this indicate?
The disk descriptor table (/boot/map) is corrupt.
In a Linux system, the set of recent kernel messages is known as the kernel ring buffer. Which command displays these messages?
dmesg
Which command in Linux is useful to help resolve printing problems?
lpq
What is the maximum amount of down time a mission-critical application can have during the course of the year if the application has a 99.999% availability requirement?
5 minutes
The graphic displays output from the dmesg command. Where are the messages coming from?
the kernel
Which TCP/IP utility prints information about network connections, routing tables, and interfaces?
netstat
Which Redundant Array of Inexpensive Disks (RAID) level is also known as disk mirroring?
RAID 1
What is the name of the signal that a network administrator sends to remotely power up a computer that has a NIC with WOL technology capabilities?
magic packet
What is the simplest and most recommended method of creating a custom emergency boot disk for Linux?
Modify one of the existing boot disks.
hot site
Read More..The Internet poses many security issues. What is characteristic of Internet security for corporate networks?
Internet protocols have an inherent lack of security and Internet rules have loopholes that can be exploited.
What can be used to repair security 'holes' in software?
a security patch
Which layer of the OSI reference model is involved when an access list denies traffic to a specific port?
Layer 4
/sbin/ipfw/add allow tcp from any to 10.90.0.3 80 What does the 80 signify in the ipfw configuration statement
well-known port for web servers
What is one security advantage that magnetic access cards have over physical keys?
They allow the authorization to be revoked from a central server
Which of the following are characteristics of a good password policy? (Select two.)
It should expire passwords after a specified time
It should require passwords that are a mixture of letters and numbers
Which term describes an insecure host that has a permanent Internet connection and is used in a DDoS attack?
a zombie
What is the purpose of a firewall?
preventing unwanted or malicious IP packets from reaching a network
What can be done with a packet when using packet filtering?
It can be forwarded, dropped, or processed.
What should an administrator do before installing a major software upgrade on a production server?
test the results on a test server
When does it make sense to use a NOS as a firewall solution
if there is a low-traffic environment
What is the first step in creating a security policy for a company network?
Define an Acceptable Use policy
Which layers of the OSI model are examined in the most comprehensive form of stateful packet filtering?
3, 4, and 7
Which agency discovers and studies Internet-related security vulnerabilities?
CERT/CC
What is one method of implementing a firewall?
ACLs
What is the only 100 percent effective measure to protect the network from outside attacks?
Disconnect from the outside network.
Which type of DoS attack uses three-way handshaking to leave multiple 'half-open' connections?
TCP SYN
Which of the following are examples of biometric security devices? (Select two.)
fingerprint reader
retinal scanner
NAT is a process used to protect local networks from hackers. Which list of items applies to NAT?
It rewrites the addressing information in IP packets.
It protects private IP addresses from the Internet.
Outside hackers cannot directly reach private IP addresses.
When do software manufacturers release security updates?
when vulnerabilities are discovered and fixed
