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Q1. A network engineer is troubleshooting an issue with a computer that is unable to connect to the Internet. The network engineer analyzes the following output from a command line utility:
Network DestinationNetmask Gateway Interface
192.168.1.0 255.255.255.0 192.168.1.254 eth0
192.168.1.10255.255.255.255 192.168.1.10 eth0
127.0.0.1255.0.0.0 On-Link lo
127.0.0.0255.0.0.0 On-Link lo
255.255.255.255255.255.255.255 102.168.1.10 eth0
Which of the following is the reason for the computer issue, given the above output?
A. Wrong default gateway netmask
B. Incorrect default gateway address
C. Default gateway on the wrong interface
D. Missing default gateway
Answer: D
Q2. Two weeks after installation, a network technician is now unable to log onto any of the newly installed company switches. The technician suspects that a malicious user may have changed the switches' settings before they were installed in secure areas. Which of the following is the MOST likely way in which the malicious user gained access to the switches?
A. Via SSH using the RADIUS shared secret
B. Via HTTP using the default username and password
C. Via console using the administrator's password
D. Via SNMP using the default RO community
Answer: B
Q3. A network administrator recently installed a web proxy server at a customer's site. The following week, a system administrator replaced the DNS server overnight. The next day, customers began having issues accessing public websites. Which of the following will resolve the issue?
A. Update the DNS server with the proxy server information.
B. Implement a split horizon DNS server.
C. Reboot the web proxy and then reboot the DNS server.
D. Put the proxy server on the other side of the demarc.
Answer: A
Q4. Multiple students within a networking lab are required to simultaneously access a single switch remotely. The administrator checks and confirms that the switch can be accessed using the console, but currently only one student can log in at a time. Which of the following should be done to correct this issue?
A. Increase installed memory and install a larger flash module.
B. Increase the number of VLANs configured on the switch.
C. Decrease the number of VLANs configured on the switch.
D. Increase the number of virtual terminals available.
Answer: D
Q5. Which of the following does a network technician need to implement if a change is unsuccessful within the approved maintenance window?
A. Configuration procedures
B. Stakeholder notification
C. Impact analysis
D. Rollback procedure
Answer: D
Q6. Company policies require that all network infrastructure devices send system level information to a centralized server. Which of the following should be implemented to ensure the network administrator can review device error information from one central location?
A. TACACS+ server
B. Single sign-on
C. SYSLOG server
D. Wi-Fi analyzer
Answer: C
Q7. Which of the following requires the network administrator to schedule a maintenance window?
A. When a company-wide email notification must be sent.
B. A minor release upgrade of a production router.
C. When the network administrator's laptop must be rebooted.
D. A major release upgrade of a core switch in a test lab.
Answer: B
Q8. CORRECT TEXT
Alter recent changes to the pictured network, several users are unable to access the servers. Only PC1, PC2, PC3, and PC4 are clickable and will give you access to the command prompt and the adapter configuration tabs.
Instructions: Verify the settings by using the command prompt, after making any system changes. Next, restore connectivity by making the appropriate changes to the infrastructure. When you have completed these steps, select the Done button to submit.
Answer:
On PC3, change the subnet mask to 255.255.255.0. When it is set to 255.255.255.128, then the PC with a .129 address will not be on the same subnet as the default gateway which is .1 On PC4, change the default gateway to 10.0.2.1. It has been incorrectly set as 10.1.2.1.
Q9. Which of the following is true about the main difference between a web session that uses port 80 and one that uses port 443?
A. Port 80 web sessions often use application-level encryption, while port 443 sessions often use transport-level encryption.
B. Port 80 web session cannot use encryption, while port 443 sessions are encrypted using web certificates.
C. Port 80 web sessions can use web application proxies, while port 443 sessions cannot traverse web application proxies.
D. Port 80 web sessions are prone to man-in-the-middle attacks, while port 443 sessions are immune from man-in-the-middle attacks.
Answer: A
Q10. Which of the following is the main difference between TCP and UDP?
A. TCP data flows in two directions, while UDP data flows from server to client.
B. The TCP header implements flags, while the UDP header does not.
C. The TCP header implements checksum, while the UDP header does not.
D. TCP connections can be secured by stateful firewalls, while UDP connections cannot.
Answer: B
Q11. Joe, a network technician, is setting up a DHCP server on a LAN segment. Which of the following options should Joe configure in the DHCP scope, in order to allow hosts on that LAN segment using dynamic IP addresses, to be able to access the Internet and internal company servers? (Select THREE).
A. Default gateway
B. Subnet mask
C. Reservations
D. TFTP server
E. Lease expiration time of 1 day
F. DNS servers
G. Bootp
Answer: ABF
Q12. Which of the following devices implements CSMA/CA virtually through the RTS/CTS protocols?
A. Firewall
B. Router
C. 802.11 AP
D. Switch
Answer: C
Q13. A network technician receives the following alert from a network device:
"High utilizations threshold exceeded on gi1/0/24 : current value 9413587.54"
Which of the following is being monitored to trigger the alarm?
A. Speed and duplex mismatch
B. Wireless channel utilization
C. Network device CPU
D. Network device memory
E. Interface link status
Answer: E
Q14. A technician needs to ensure that new systems are protected from electronic snooping of Radio Frequency emanations. Which of the following standards should be consulted?
A. DWDM
B. MIMO
C. TEMPEST
D. DOCSIS
Answer: C
Q15. A network administrator has created a virtual machine in the cloud. The technician would like to connect to the server remotely using RDP. Which of the following default ports needs to be opened?
A. 445
B. 3389
C. 5004
D. 5060
Answer: B