Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks choose two?

Pass MCSE Exams Free Fast 100% Free MCSE Latest Exam Du Become Certi�ed Specialist Fast CCNA1 v6.0 Chapter 8 Exam Answers 2018 (100%) 1. What is a result of connecting two or more switches together? The number of broadcast domains is increased. The size of the broadcast domain is increased.* The number of collision domains is reduced. The size of the collision domain is increased. 2. Refer to the exhibit. How many broadcast domains are there? CCNA 1 v6.0 Chapter 8 PDFCCNA 1 v6.0 Chapter 8 PDF Take AssessmentTake Assessment CCNA 1 v6.0CCNA 1 v6.0 CCNA 2 v6.0CCNA 2 v6.0 CCNA 3 v6.0CCNA 3 v6.0 CCNA 4 v6.0CCNA 4 v6.0 CCNA5.NET - CCNA v6.0 Exam Answers 2018 score 100%CCNA5.NET - CCNA v6.0 Exam Answers 2018 score 100% CCNA 1 v6.0CCNA 1 v6.0 1 de 14 2 3 4* 3. What are two reasons a network administrator might want to create subnets? (Choose two.) simpli�es network design improves network performance* easier to implement security policies* reduction in number of routers needed reduction in number of switches needed 4. Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit? 2 de 14 255.255.255.0 255.255.255.128* 255.255.255.192 255.255.255.224 255.255.255.240 5. Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet? 3 de 14 IP address: 192.168.10.65 subnet mask: 255.255.255.240, default gateway: 192.168.10.76 IP address: 192.168.10.38 subnet mask: 255.255.255.240, default gateway: 192.168.10.33 IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33* IP address: 192.168.10.41 subnet mask: 255.255.255.248, default gateway: 192.168.10.46 IP address: 192.168.10.254 subnet mask: 255.255.255.0, default gateway: 192.168.10.1 6. If a network device has a mask of /28, how many IP addresses are available for hosts on this network? 256 254 62 32 16 14* 7. Which subnet mask would be used if 5 host bits are available? 4 de 14 255.255.255.0 255.255.255.128 255.255.255.224* 255.255.255.240 8. How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0? 510 512 1022* 1024 2046 2048 9. How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks? two three* four �ve 10. A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices: IP phones – 22 addresses PCs – 20 addresses needed Printers – 2 addresses needed Scanners – 2 addresses needed 5 de 14 The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks? 255.255.255.0 255.255.255.192 255.255.255.224* 255.255.255.240 255.255.255.248 255.255.255.252 11. A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.) 192.168.1.16/28 192.168.1.64/27* 192.168.1.128/27 192.168.1.96/28* 192.168.1.192/28 12. A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.248. How many usable host addresses will this subnet provide? 4 6* 8 10 6 de 14 12 13. Refer to the exhibit. Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many total host addresses are unused in the assigned subnets? 56 60 64 68 72* 14. Refer to the exhibit. Considering the addresses already used and having to remain within the 10.16.10.0/24 network range, which subnet address could be assigned to the network containing 25 hosts? 7 de 14 10.16.10.160/26 10.16.10.128/28 10.16.10.64/27* 10.16.10.224/26 10.16.10.240/27 10.16.10.240/28 15. A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices? random static addresses to improve security addresses from di�erent subnets for redundancy predictable static IP addresses for easier identi�cation* dynamic addresses to reduce the probability of duplicate addresses 16. Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.) It eliminates most address con�guration errors.* 8 de 14 It ensures that addresses are only applied to devices that require a permanent address. It guarantees that every device that needs an address will get one. It provides an address only to devices that are authorized to be connected to the network. It reduces the burden on network support sta�.* 17. A DHCP server is used to assign IP addresses dynamically to the hosts on a network. The address pool is configured with 192.168.10.0/24. There are 3 printers on this network that need to use reserved static IP addresses from the pool. How many IP addresses in the pool are left to be assigned to other hosts? 254 251* 252 253 18. Refer to the exhibit. A company is deploying an IPv6 addressing scheme for its network. The company design document indicates that the subnet portion of the IPv6 addresses is used for the new hierarchical network design, with the site subsection to represent multiple geographical sites of the company, the sub-site section to represent multiple campuses at each site, and the subnet section to indicate each network segment separated by routers. With such a scheme, what is the maximum number of subnets achieved per sub-site? 9 de 14 0 4 16* 256 19. What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64? 2001:DB8:BC15 2001:DB8:BC15:A* 2001:DB8:BC15:A:1 2001:DB8:BC15:A:12 20. Consider the following range of addresses: 2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000:: … 2001:0DB8:BC15:00AF:0000:: 10 de 14 The prefix-length for the range of addresses is /60 21. Match the subnetwork to a host address that would be included within the subnetwork. (Not all options are used.) Place the options in the following order. — not scored — 192.168.1.68 -> 192.168.1.64/27 — not scored — 192.168.1.48 -> 192.168.1.32/27 192.168.1.121 -> 192.168.1.96/27 22. Refer to the exhibit. Match the network with the correct IP address and prefix that will satisfy the usable host addressing requirements for each network. (Not all options are used.) 11 de 14 Place the options in the following order. — not scored — 192.168.0.192 /27 -> Network C — not scored — 192.168.0.0 /25 -> Network A 192.168.0.224 /30 -> Network D 192.168.0.128 /26 -> Network B Spread the love 12 de 14 Comments 00 February 6, 2017 by CCNA5.NET in CCNA 1 v6.0, Uncategorized Comment Name Email Time limit is exhausted. Please reload the CAPTCHA. 13 de 14  × nine = thirty six Add CommentAdd Comment 14 de 14

Dynamic Host Configuration Protocol (DHCP) is a network management protocol used to automate the process of configuring devices on IP networks, thus allowing them to use network services such as DNS, NTP, and any communication protocol based on UDP or TCP. A DHCP server dynamically assigns an IP address and other network configuration parameters to each device on a network so they can communicate with other IP networks. DHCP is an enhancement of an older protocol called BOOTP. DHCP is an important part of the DDI solution (DNS-DHCP-IPAM).

This video is an abstract of our DHCP demystified training available in our DDI introduction cursus composed of DHCP, DNS and IPAM. By watching it, you will learn the role of DHCP, the principles of the DHCP protocol and the message flows between a client and a server.

The basic flow is that a DHCP server hands out configuration data, based on the administrator’s policy, to a requesting client. Common network parameters (sometimes referred to as “DHCP Options“) requested include subnet mask, router, domain name server, hostname and domain name.

As the requesting client has no IP address when joining the network, it broadcasts the request. The protocol is thus used in a very early stage of IP communication. If such dynamic protocol is not used to get an IP address, the client has to use a predefined IP address generally called “static IP address”, which is manually configured on the client network interface in configuration files or with a specific command.

The DHCP service brings three key values: 1) Operation tasks are reduced: the network administrator no longer needs to manually configure each client before it can use the network 2) The IP addressing plan is optimized: addresses no longer being used are freed up and made available to new clients connecting 3) User mobility is easily managed: the administrator doesn’t need to manually reconfigure a client when its network access point changes.

The IP address information assigned by DHCP is only valid for a limited period of time, and is known as a DHCP lease. The period of validity is called the DHCP lease time. When the lease expires, the client can no longer use the IP address and has to stop all communication with the IP network unless he requests to extend the lease “rent” via the DHCP lease renewal cycle. To avoid impacts of the DHCP server not being available at the end of the lease time, clients generally start renewing their lease halfway through the lease period. This renewal process ensures robust IP address allocation to devices. Any device asking for a new IP version 4 address at arrival on the network and not receiving an answer will use automatic private internet protocol addressing (APIPA) to select an address. These addresses are in the network range 169.254.0.0/16.

There are four key DHCP usage scenarios: 1. Initial Client Connection: the client requests from the DHCP server an IP address and other parameter values for accessing network services 2. IP Usage Extension: the client contacts the DHCP server to extend usage of its current IP address 3. Client Connection After Reboot: the client contacts the DHCP server for confirmation that it can use the same IP address being used before reboot 4. Client Disconnection: the client requests the DHCP server to release its IP address.

DHCP options can be used to automatically provide clients with information on the network services it can use. This is a very efficient way to push the IP address of the time server, the mail server, the DNS server and the printer server. This can also be used to provide a file name and a file server that will be used by the client to start a specific boot process – mainly used for IP phones and Wi-Fi access points, but can also be used for auto-installing clients and servers with PXE (Preboot eXecution Environment).

The original and most comprehensive implementation of the DHCP service is offered by the Internet Systems Consortium (ISC). Supporting both IPv4 and IPv6, ISC DHCP offers a complete open source solution for implementing DHCP servers, relay agents, and clients. Other DHCP Server products include the Microsoft DHCP server.

The DHCP service can be enhanced by DHCP failover to bring high availability and load balancing of traffic. The ISC DHCP Failover relies on having a pair of collaborating servers – a primary (master) server and a secondary (backup) server. A TCP-based communication channel, called a failover channel, then has to be set up between the two servers.