Cisco Discovery - Cisco Discovery - DHomesb Module 5 - V.4 .

Q.1 How large are IPv4 addresses?
8 bits   
16 bits  
 ?32 bits   
64 bits   
128 bits


Q.2 Refer to the graphic. A user at the workstation cannot connect to the server. All cables have been tested and are working and all devices have IP addressing. However, the user cannot ping the server. What is causing the problem?
The router interface does not have a default gateway.   
The switch does not have an IP address and default gateway.  
 ?The workstation and server are on different logical networks.   
The workstation does not know the MAC address of the switch.


Q.3 Which part of an IP address identifies a specific device on a network?
first two octets   
third and fourth octets   
network portion   
?host portion   
only the fourth octet


Q.4 Given a host with the IP address 172.32.65.13 and a default subnet mask, to which network does the host belong?
172.32.65.0  
 172.32.65.32   
?172.32.0.0   
172.32.32.0


Q.5 Which default subnet mask provides the most host bits?
? 255.0.0.0   
255.255.0.0  
 255.255.255.0   
255.255.255.252


Q.6 How many bits are available for Class B host IP addresses using a default subnet mask?
4  
 8   
?16   
24


Q.7 How many usable hosts are available given a Class C IP address with the default subnet mask?
?254   
255   
256   
510  
 511  
 512


Q.8 Assuming a default mask, which portion of the IP address 175.124.35.4 represents the host?
175.124   
?35.4   
.4   
124.35.4   
175.124.35


Q.9 Which of the following are private IP addresses? (Choose three.)
?10.1.1.1   
172.32.5.2   
192.167.10.10   
?172.16.4.4   
?192.168.5.5   
224.6.6.6


Q.10 What destination IP address is used in a unicast packet?
? a specific host   
a group of host   
the default gateway   
the network broadcast address


Q.11 What is the destination MAC address in a multicast Ethernet frame?
the MAC address of the sending host  
 the MAC address of the destination hos   
?an address that begins with 01-00-5E in hexadecimal  
 a 48-bit hexadecimal address expressed as FF-FF-FF-FF-FF-FF


Q.12 Yvonne is talking to her friend on the phone. What type of message is this?
broadcast  
 simulcast   
multicast  
 ?unicast


Q.13 What information must be included within a unicast message for it to be delivered on an Ethernet network?
MAC and IP addresses for the default router   
IP address and subnet mask of the default gateway   
MAC and IP addresses that correspond to a destination grou   
?MAC and IP addresses that correspond to a specific destination host


Q.14 A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?
The configuration is permanent and nothing changes.   
The address lease is automatically renewed until the PC is returned.   
?The address is returned to the pool for reuse when the lease expires.   
The configuration is held by the server to be reissued when the PC is returned.


Q.15 Which type of server dynamically assigns an IP address to a host?
ARP  
? DHCP  
 DNS  
 RARP

Q.16 Which three statements describe a DHCP Discover message? (Choose three.)
The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF).   
?The destination IP address is 255.255.255.255.   
The message comes from a server offering an IP address.   
?The message comes from a client seeking an IP address.   
?All hosts receive the message, but only a DHCP server replies.   
Only the DHCP server receives the message.


Q.17 Refer to the graphic. A host connects to a Linksys integrated router that is also a DHCP server and receives an IP address from it. Which address does the host need to access the ISP and the Internet?
IP address of the destination host   
public gateway IP address of the ISP   
external IP address of the integrated router that connects to the ISP  
 ?internal IP address of the integrated router that connects to the local network


Q.18 Which statement is true concerning private IP addresses?
ensures that two networks separated by the Internet use unique IP network numbers   
allows internal hosts to communicate with servers across the Internet  
 ?solves the issue of a finite number of available public IP addresses  
 allows for ISPs to be able to quickly determine network location


Q.19 What is one of the purposes of NAT?
filters network traffic based on IP address ranges   
?prevents external users from detecting the IP addresses used on a network   
inspects traffic that might be harmful or used in an attack against the network   
translates IP addresses into easy-to-remember domain names


Q.20 Which two statements describe packets that are sent through a Linksys integrated router using NAT? (Choose two.)
Packets that are sent to any destination need to be translated.   
?Packets that are sent to hosts on the same network need to be translated.  
 Packets that are sent to a destination outside the local network need to be translated.   
Packets that are sent to a destination outside a local network do not need to be translated.  
 ?Packets that are sent between hosts on the same local network do not need to be translated.


Q.21 Refer to the graphic. NAT and DHCP are installed on the Linksys integrated router. Which IP address is most likely to be assigned to the local computer, Host1?
?10.0.0.17  
 128.107.1.2   
192.135.250.0   
209.165.201.1

Cisco Discovery - DHomesb Module 4 - V.4 in english.

Q.1 Which definition describes the term Internet?
a group of PCs connected together on a LAN   
a group of PCs connected together by an ISP  
? a network of networks that connects countries around the world   
a worldwide collection of networks controlled by a single organization


Q.2 What type of connection point is a point of presence (POP)?
between a client and a host  
 between two local networks  
 between a computer and a switch  
? between an ISP and a home-based LAN


Q.3 What is the term for the group of high-speed data links that interconnect ISPs?
Internet LAN   
?ISP backbone   
Internet gateways   
Internet providers   
Internet backbone


Q.4 Which device can act as a router, switch, and wireless access point in one package?
hub  
 bridge   
modem   
repeater   
?ISR


Q.5 What are three characteristics of business class ISP service? (Choose three.)
? fast connections  
 ?extra web space   
free Windows upgrade   
?cheapest cost available to all users   
additional e-mail accounts   
replacement hardware at no cost


Q.6 What is a major characteristic of asymmetric Internet service?
Download speeds and upload speeds are equal.   
Download speeds are slower than upload speeds.   
?Upload speeds and download speeds are different.   
Upload speeds and download speeds are irrelevant.


Q.7 Which three elements are required to successfully connect to the Internet? (Choose three.)
?an IP address   
file sharing enabled   
?a network connection   
server services enabled   
?access to an Internet service provider   
an address obtained directly from the RIR


Q.8 What term describes each router through which a packet travels when moving between source and destination networks?
NOC   
ISP  
 ?hop   
segment


Q.9 What does the tracert command test?
NIC functionality   
the ISP bandwidth   
?the network path to a destination   
the destination application functionality


Q.10 What type of end-user connectivity requires that an ISP have a DSLAM device in their network?
analog technology   
cable modem technology   
?digital subscriber line technology   
wireless technology


Q.11 Why would an ISP require a CMTS device on their network?
? to connect end users using cable technology   
to connect end users using analog technology   
to connect end users using wireless technology   
to connect end users using digital subscriber line technology


Q.12 Refer to the graphic. What type of cabling is shown?
STP  
 UTP   
coax   
?fiber


Q.13 Refer to the graphic. What type of cabling is shown?
STP   
?UTP   
coax  
 fiber


Q.14 Which two places are most appropriate to use UTP cabling? (Choose two.)
between buildings   
?in a home office network   
where EMI is an issue  
 in a cable TV network   
?inside a school building  
 in a manufacturing environment with hundreds of electrical devices


Q.15 What does adherence to cabling standards ensure?
data security   
no loss of signal   
no electromagnetic interference   
?reliable data communications


Q.16 Refer to the graphic. What type of cable is shown?
? crossover   
eight coax channels   
multimode fiber   
single-mode fiber  
 straight-through


Q.17 What connector is used to terminate Ethernet unshielded twisted pair (UTP) cabling?
ST   
BNC  
 RJ-11   
?RJ-45


Q.18 Which two characteristics describe copper patch panels? (Choose two.)
uses RJ-11 jacks   
?uses RJ-45 jacks   
supports only data transmissions   
allows quick rearrangements of network connections  
 forwards transmissions based on MAC addresses


Q.19 What are two advantages of cable management? (Choose two.)
requires no preplanning   
?aids in isolation of cabling problems   
?protects cables from physical damage   
provides compliance with future standards   
provides a short-term solution for cable installation


Q.20 What are two common causes of signal degradation when using UTP cabling? (Choose two.)
installing cables in conduit   
?having improper termination  
losing light over long distances  
installing low quality cable shielding  
 ?using low quality cables or connectors


Q.21 What are three commonly followed standards for constructing and installing cabling? (Choose three.)
?pinouts   
?cable lengths   
connector color   
connector types   
cost per meter (foot)   
tensile strength of plastic insulator.

Cisco Discovery - Cisco Discovery - DRSEnt Module 7 - V.4 .

DRSEnt Chapter 7 Exam Answers


1. Why are Network Control Protocols used in PPP?
to establish and terminate data links
 to provide authentication capabilities to PPP
 to manage network congestion and to allow quality testing of the link
• to allow multiple Layer 3 protocols to operate over the same physical link


2. What is the data transmission rate for the DS0 standard?
44 kb/s
• 64 kb/s
 1.544 Mb/s
 44.736 Mb/s


3. In which two layers of the OSI model are key differences found between a LAN and a WAN. (Choose two.)
• Layer 1
• Layer 2
 Layer 3
 Layer 4
 Layer 6
 Layer 7


4. Which statement is true about the Cisco implementation of the HDLC protocol?
It supports authentication.
 It has a universally compatible frame format.
• It is the default encapsulation for serial interfaces on Cisco routers.
 It does not support multiple protocols across a single link.


5.
Refer to the exhibit. A network administrator has a connectivity problem between the serial interfaces of Merida and Vargas. What is the cause of the problem?
Authentication is required on the serial link.
• The encapsulation is misconfigured.
 The IP addresses are on different subnets.
 The serial interface on Vargas is shutdown.
 The loopback interfaces on both routers are not configured.

6.
Refer to the exhibit. What statement is true about the exhibited output?
LCP is in the process of negotiating a link.
 LCP and NCP are waiting for CHAP authentication to complete.
 LCP negotiation has completed successfully, but NCP negotiation is in progress.
• LCP and NCP negotiation is complete, and the data link service is available to carry packets.

7. Which three statements are true regarding LCP? (Choose three.)
• It is responsible for negotiating link establishment.
 It negotiates options for Layer 3 protocols running over PPP.
 It uses MD5 encryption while negotiating link-establishment parameters.
• It terminates the link upon user request or the expiration of an inactivity timer.
• It can test the link to determine if link quality is sufficient to bring up the link.
 It monitors the link for congestion and dynamically adjusts the acceptable window size.


8. Why are Frame Relay paths referred to as virtual?
Frame Relay PVCs are created and discarded on demand.
 The connections between PVC endpoints act like dialup circuits.
 There are no dedicated circuits to and from the Frame Relay carrier.
• The physical circuits inside the Frame Relay cloud do not contain exclusive links for a specific Frame Relay connection.


9. What best describes the use of a data-link connection identifier (DLCI)?
• an address identifying a virtual circuit
 a logical address identifying the DCE device
 an address identifying a Layer 3 service across a Frame Relay network
 a logical address identifying the physical interface between a router and a Frame Relay switch


10. What two services allow the router to dynamically map data link layer addresses to network layer addresses Frame Relay network? (Choose two.)
ARP
 ICMP
 Proxy ARP
• Inverse ARP
• LMI status messages


11. Which three statements describe functions of the Point-to-Point Protocol with regards to the OSI model?(Choose three.)
operates at all layers of the OSI model
• provides a mechanism to multiplex several network layer protocols
• can be configured on both synchronous and asynchronous serial interfaces
 uses Layer 3 of the OSI model to establish and maintain a session between devices
• uses the data link layer to configure such options as error detection and compression
 uses network control protocols to test and maintain connectivity between devices


12. At what physical location does the responsibility for a WAN connection change from the user to the service provider?
demilitarized zone (DMZ)
• demarcation point
 local loop
 cloud


13. What does a Frame Relay switch use to inform the sender that there is congestion?
FECN
• BECN
 DE
 FCS


14.
Refer to the exhibit. What statement is true about the debug output?
R2 is using PAP instead of CHAP.
• The routers have different CHAP passwords configured.
 The administrator performed a shutdown on the R2 PPP interface during negotiation.
 The Layer 3 protocol negotiation caused the connection failure.

15. Which two statements describe the function of time-division multiplexing? (Choose two.)
• Multiple data streams share one common channel.
 Conversations that require extra bandwidth receive any unused time slices.
 Time slots are utilized on a first-come, first-served basis.
• Time slots go unused if a sender has nothing to transmit.
 Priority can be dedicated to one data source.


16. When customers use credit cards to make purchases at a small business, a modem is heard dialing a telephone number to transfer the transaction data to the central office. What type of WAN serial connection is in use?
leased line
 point-to-point
• circuit switched
 packet switched


17. Which best describes data communications equipment (DCE)?
serves as data source and/or destination
 responsible for negotiating windowing and acknowledgements
 physical devices such as protocol translators and multiplexers
• equipment that forwards data and is responsible for the clocking signal

18. Permanent virtual circuits and switched virtual circuits are both part of which option for WAN connectivity?
leased line
 cell switching
• packet switching
 circuit switching


19. Which field of a frame uses error detection mechanisms to verify that the frame is not damaged intransit?
• FCS
 MTU
 flag
 control
 protocol


20. What occurs in the encapsulation process as a data packet moves from a LAN across a WAN?
• The Layer 2 encapsulation changes to a format that is appropriate for the WAN technology.
 The Layer 3 encapsulation changes to a format that is appropriate for the WAN technology.
 Both Layer 2 and Layer 3 encapsulation change to a technology that is appropriate for the WAN.
 Both Layer 2 and Layer 3 encapsulation remain constant as the data packet travels throughout the network.


21.
Refer to the exhibit. The network administrator is configuring R1 to connect to R2, which is a non-Cisco router. Which encapsulation method will need to be configured for communication to occur?
HDLC
 HSSI
 ISDN
 IPCP
• PPP


22. A company is implementing dialup services for remote workers to connect to the local network. The company uses multiple Layer 3 protocols and requires authentication for security. Which protocol should be used for this remote access?
LMI
• PPP
 HDLC
 Frame Relay


23. Which two options can LCP negotiate? (Choose two.)
• compression
• authentication 
 dynamic flow control
 network layer address for IP
 connection-oriented or connectionless communication methods


24. What statement best describes cell switching?
It uses a dedicated path between endpoints.
 It creates a permanent physical link between two points.
 It uses DLCIs to identify virtual circuits.
• It creates fixed-length packets that traverse virtual circuits.

Cisco Discovery - Cisco Discovery - DRSEnt Module 5 - V.4 .

What prevents RIPv1 updates from being correctly advertised?
an increase in network load
?the use of variable length subnet masks
the use of multiple Layer 3 networks on the same router
a variation in connection speeds on the links to a destination
a mismatch between the configured bandwidth and the actual bandwidth of a link

What is the default administrative distance for EIGRP internal routes?
70	
?90	
100	
110	
120	
255


What is indicated when an EIGRP route is in the passive state?
The route has the highest path cost of all routes to that destination network.
The route must be confirmed by neighboring routers before it is put in the active state.
The route is a feasible successor and will be used if the active route fails.
There is no activity on the route to that network.
?The route is viable and can be used to forward traffic.

An enterprise network currently uses a star topology to connect the headquarters to four branch offices. The network administrator wants to make one of the branch offices a centralized connection for three new local offices. What is the resulting topology?
?full mesh
partial mesh
extended star
topology remains a star

Refer to the exhibit. How is the 64.0.0.0/8 route significant to the EIGRP process?
?This router is advertising a summary route to an EIGRP neighbor.
This router has the no autosummary command entered under the EIGRP routing process.
This router drops all packets that are destined to the 64.0.0.0/8 IP address range.
This router has received a summary route from an EIGRP neighbor.	
This router is using a summary route instead of a default route as a network design option.


What is the maximum distance in hops that a remote router can be and still be considered reachable by RIP?
14 hops	
?15 hops
16 hops
17 hops

Refer to the exhibit. What three conclusions can be determined based on the exhibited commands? (Choose three.)
A link-state routing protocol is used.	
?A distance vector routing protocol is used.	
?Routing information updates are broadcast every 30 seconds.
Routing information updates are broadcast every 90 seconds.
?Hop count is the only metric used for route selection.
Bandwidth, load, delay, and reliability are metrics that are used for route selection.

Refer to the exhibit. Routers A and B have EIGRP configured, and automatic summarization has been disabled on both routers. Which command applied on interface S0/0/0 of router A manually summarizes the networks in EIGRP advertisements to router B?
ip area-range eigrp 1 192.168.10.80 255.255.255.224
?ip summary-address eigrp 1 192.168.10.64 255.255.255.192
ip summary-address 192.168.10.80 0.0.0.31
ip summary-address eigrp 1 192.168.10.64 0.0.0.63
ip area-range eigrp 1 192.168.10.64 255.255.255.224

Which two features of EIGRP are different from RIPv2? (Choose two.)
?routing metric
VLSM support
?routing updates
classless routing
MD5 authentication method

Refer to the exhibit. The network is configured with RIP routing. Which mechanism prevents R1 from sending an information update about network A to R3?
poisoned reverse	
?split horizon	
holddown timers	
TTL

What three statements are true about routers that are configured for EIGRP? (Choose three.)
?They can support multiple routed protocols.
They can support only link-state protocols.
They send their entire topology tables to neighboring routers.
?They send partial routing updates in response to topology changes.
They send routing updates to all other routers in the network.
?They use hello packets to inform neighboring routers of their status.

When should EIGRP automatic summarization be turned off?
when a router has not discovered a neighbor within three minutes
when a router has more than three active interfaces	
?when a network contains discontiguous network addresses
when a router has less than five active interfaces
when a network addressing scheme uses VLSM

Refer to the exhibit. R1 is not receiving updates from R2. Conversely, R2 is not receiving updates from R1. RIP version 1 is configured. All interfaces are up and functioning. The network statements are correct. All IP addressing is correct. What can be done to fix this problem?
Convert RIP version 1 to version 2 using the version 2 command..
Remove automatic classful summarization with the no auto-summary routing protocol command.
?Replace RIP version 1 with version 2 and disable automatic classful summarization.
On both routers, configure the serial interface as a passive interface. 	
On both routers, change the subnet mask on the Fast Ethernet interface to be 255.255.255.0.

What does a router that is running RIP use to determine the best path to take when forwarding data?
the host portion of the network address
the speed of network convergence
?the calculated metric for the destination network
the number of broadcasts occurring on an interface
the number of errors occurring on an interface

What two statements are correct regarding EIGRP authentication? (Choose two.)
?EIGRP authentication uses the MD5 algorithm.
?EIGRP authentication uses a pre-shared key.
EIGRP authentication requires that both routers have the same key chain name.
EIGRP authentication uses varying levels of WEP to encrypt data exchanged between routers.
EIGRP authentication can be configured on one router and updates from this router are protected; whereas a neighbor router can be without the authentication configuration and its updates are unprotected.

Refer to the exhibit. The network administrator needs to configure a default route on the border router. Which command correctly configures a default route that will require the least amount of router processing when forwarding packets?
ip route 0.0.0.0 0.0.0.0 64.100.59.5
ip route 0.0.0.0 0.0.0.0 64.100.59.6
?ip route 0.0.0.0 0.0.0.0 s0/0/1
ip route 0.0.0.0 0.0.0.0 s1/2/1

How do EIGRP routers establish and maintain neighbor relationships?
by exchanging neighbor tables with directly attached routers
by comparing known routes to information received in updates
?by exchanging hello packets with neighboring routers
by dynamically learning new routes from neighbors
by exchanging routing tables with directly attached routers

Refer to the exhibit. A network administrator is troubleshooting a routing problem. When the show ip route command is entered on RTR-1, only the serial link between RTR-2 and RTR-3 has been learned from the RIP routing protocol. What are two issues? (Choose two.)
?RIPv1 is a classful routing protocol.
RIPv1 does not support subnetting.
The Ethernet networks on RTR-2 and RTR-3 were not entered correctly in the network statements on these routers.
?RIPv1 does not support VLSM.
RIPv1 is a classless routing protocol.

Refer to the exhibit. Which statement is true about the output from the show ip protocols command?
?RIPv2 is configured on this router.	
Auto summarization has been disabled.	
The next routing update is due in 17 seconds.	
192.168.16.1 is the address configured on the local router.

Refer to exhibit. What two features are true of the exhibited topology? (Choose two.)
introduces a single point of failure
is required when no downtime is acceptable
provides the maximum redundancy available
?provides redundancy to critical areas
represents an extended star topology
?is used to meet uptime and reliability requirements while limiting costs

Which Layer 4 protocol does EIGRP use to provide reliability for the transmission of routing information?
DUAL	
IP	
PDM	
?RTP	
TCP	
UDP

A network administrator issues the command show ip route and observes this line of output:

192.168.3.0/24 [120/2] via 192.168.2.2, 00:00:05, Serial0/0
What two pieces of information can be obtained from the output? (Choose two.)

?RIP is the routing protocol that is configured.	
This is a static route to network 192.168.3.0.	
?The metric for this route is 2.	
The next periodic update is in 5 seconds.
The autonomous system number is 120.

What is the purpose of the network command when RIP is being configured as the routing protocol?
It identifies the networks connected to the neighboring router.	
It restricts networks from being used for static routes.	
It identifies all of the destination networks that the router is allowed to install in its routing table.
?It identifies the directly connected networks that will be included in the RIP routing updates.

В корпоративной сети на настоящий момент используется звездообразная топология для соединения центрального офиса с четырьмя филиалами. Сетевому администратору требуется сделать один из филиалов точкой централизованного соединения с тремя новыми локальными офисами. Какая топология получится в результате этого?

полносвязная ячеистая
частично-ячеистая
?расширенная звезда
топология останется звездообразной

Посмотрите на изображение. Что представляет собой маршрут Null0 для сети 128.107.0.0?

Заданный дочерний маршрут.
Заданный родительский маршрут, исходящий из физического интерфейса.
?Суммарный маршрут для объявлений, не являющийся действительным путем.
Результат выполнения команды no auto-summary на маршрутизаторе.

Посмотрите на изображение. Маршрутизаторы настроены с использованием EIGRP и значений K по умолчанию. По какому маршруту пойдет пакет из сети A в сеть B?

R1, R2, R5
R1, R3, R5
R1, R2, R3, R5
R1, R2, R4, R5
?R1, R3, R2, R5
R1, R3, R2, R4, R
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