JK0-023 Exam Dumps - Prepare JK0-023 Dumps PDF

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2. Version: 6.0 Question 1 Which of the following ports is the default telnet port? A. 20 B. 21 C. 22 D. 23 Aoswern D Question 2 A bridge handles frames at which of the following layers of the OSI model? A. Network B. Session C. Transport D. Data Link Aoswern D Question 3 A company is about to install a second network connecton with a new ISP. Which of the following routng protocols is the BEST choice? A. IS-IS B. BGP C. OSPF D. RIP Aoswern B Question 4 Which of the following layers of the OSI model maps to the Network Interface layer of the TCP stack? (Select TWO). A. Physical B. Session C. Data Link D. Network

3. E. Transport Aoswern A, C Question 5 Which of the following is a reason to use dynamic DNS? A. The host IP address is not listed in the frewall. B. The host IP address is assigned by DHCP. C. Statc routes cannot be used on the host network. D. A third-party certfcate is being used. Aoswern B Question 6 Jeff a userf can no longer access the accountng fle sharef but others are stll able to access the share. Which of the following would be the FIRST step in troubleshootng the issue? A. Notfy senior management of the issue. B. Develop a probable cause theory. C. Ask Jef if anything has changed on the system. D. Escalate the issue to the vendor. Aoswern C Question 7 A layer 3 switch can move packets between subnets based on which of the following criteria? A. 802.1q tag B. Port C. Applicaton D. IP address Aoswern D Question 8 Which of the following ports should be allowed through a frewall to allow DNS resoluton to occur to an outside DNS server? A. 20 B. 53

4. C. 80 D. 3389 Aoswern B Question 9 Which of the following is a Class A private IP address? A. 4.2.2.2 B. 10.1.1.45 C. 169.254.9.15 D. 192.168.0.100 Aoswern B Question 10 Jeff a network technicianf is concerned about the environmental efects of power consumpton and heat from network resources. Limited space is also a concern. Which of the following technologies should be implemented? A. Circuit switching B. Network address translaton C. Power over Ethernet D. Virtual servers Aoswern D Question 11 Which of the following OSI layers performs error detecton using a Frame Check Sequence? A. Session B. Transport C. Physical D. Data link Aoswern D Question 12 Lisaf a network technicianf has determined that the inital theory of probable cause was incorrect. Which of the following would be the NEXT step in the troubleshootng process?

5. A. Implement the soluton B. Establish a plan C. Document fndings D. Escalate the issue Aoswern D Question 13 Which of the following protocols is Kimf a userf utliiing if no handshake or data reliability are required? A. TCP B. FTP C. TFTP D. UDP Aoswern D Question 14 Which of the following protocols would Lisaf a technicianf use to disable switch ports automatcally to prevent switching loops? A. RIP B. OSPF C. STP D. EGP Aoswern C Question 15 In which of the following layers of the OSI model does the TCP protocol operate? A. Session B. Network C. Data link D. Transport Aoswern D Question 16 Which of the following would Kimf a technicianf use in voice over IP communicatons?

6. A. SNTP B. SCP C. SMTP D. SIP Aoswern D Question 17 Which of the following represents the physical address of a network access card? A. FF01:D2:C4:87::11 B. 00-30-48-83-9B-C8 C. 08-9D-35-22-L2-34-FF-21 D. 2D1A:C3:0:1C3B:2AD:FF:FEBE:9D3A Aoswern B Question 18 In which of the following layers of the OSI model would MAC addressing be found? A. Network B. Applicaton C. Data Link D. Transport Aoswern C Question 19 Which of the following protocols resolves IP addresses to MAC addresses? A. DNS B. ARP C. RARP D. NTP Aoswern B Question 20 Which of the following port numbers is used for SNMP? A. 61

7. B. 151 C. 161 D. 1611 Aoswern C Question 21 Which of the following is an example of a Class C address? A. 10.19.0.79 B. 127.34.8.197 C. 176.96.1.222 D. 192.168.1.105 Aoswern D Question 22 Which of the following routng protocols utliies the DUAL algorithm for determining best path? A. EIGRP B. RIPv2 C. OSPF D. RIP Aoswern A Question 23 Which of the following protocols resolves IP addresses to MAC addresses? A. DNS B. ARP C. RARP D. NTP Aoswern B Question 24 Which of the following uses port 23 by default? A. TELNET B. IMAP

8. C. FTP D. SNMP Aoswern A Question 25 Which of the following has the LEAST amount of collisions in a domain? A. Bridge B. Hub C. Repeater D. Switch Aoswern D

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