CCNA 1 Version 5.1 Final Exam Answers 2016
46 Which domain name would be an example of a top-level domain?
.com
81 What are the three ranges of IP addresses that are reserved for internal private use?
1 10.0.0.0/8 2 172.16.0.0/12 3 192.168.0.0/16
31 What are three characteristics of multicast transmission?
1 A single packet can be sent to a group of hosts. 2 Multicast transmission can be used by routers to exchange routing information. 3 Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.
11 a The Benefit of Using a Layered Model
1 Assists in protocol design, because protocols that operate at a specific layer have defined information that they act upon and a defined interface to the layers above and below. 2 Fosters competition because products from different vendors can work together. 3 Prevents technology or capability changes in one layer from affecting other layers above and below. 4 Provides a common language to describe networking functions and capabilities.
52 Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router.
1 FastEthernet 0/0 packets with destination of 172.17.6.15 2 FastEthernet 0/1 packets with destination of 172.17.14.8 3 FastEthernet 1/0 packets with destination of 172.17.12.10 4 FastEthernet 1/1 packets with destination of 172.17.10.5 5 Serial 0/0/0 packets with destination of 172.17.8.20 6 the packets dropped
31 a How a multicast transmission works? https://technet.microsoft.com/en-us/library/cc759719(v=ws.10).aspx
1 Host A in Subnet 1 is the multicasting source and is sending multicast data to the multicast group address. 2 Host B in Subnet 1 has requested group membership from its local router. Because Host B has joined the multicast group, its network adapter is listening for datagrams sent to the multicast group address. The remaining host in Subnet 1 has not requested group membership, so its network adapter is filtering out traffic sent to the multicast group address. 3 Routers forward multicast data to any subnet that has group members or a router that has downstream group members. In this example, the routers are forwarding multicast data from Subnet 1 to Subnet 3. The data is also sent across Subnet 2, although it has no group members, because there are downstream group members. 4 Host C in Subnet 3 has requested group membership and is also receiving the multicast data. 5 Host D in Subnet 3 is sending a request to its local router to join the group. After Host D joins the group, its network adapter will also listen for traffic sent to the multicast group address.
20 What are two characteristics of fiber-optic cable?
1 It is not affected by EMI or RFI. 2 It is more expensive than UTP cabling is.
77 Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on?
1 The frame has the broadcast address as the destination address. 2 The destination address is unknown to the switch.
74 What are two characteristics of Ethernet MAC addresses?
1 They are globally unique. 2 They are expressed as 12 hexadecimal digits.
43 Which two tasks are functions of the presentation layer?
1 compression 2 encryption
73 What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
1 data link layer addressin 2 detection of errors through CRC calculation 3 delimiting groups of bits into frames
22 What are the three primary functions provided by Layer 2 data encapsulation?
1 data link layer addressing 2 detection of errors through CRC calculations 3 delimiting groups of bits into frames
80 Which two functions are primary functions of a router?
1 packet forwarding 2 path selection
79 Which two commands can be used on a Windows host to display the routing table? (Choose two.)
1 route print 2 netstat -r
27 What are two services provided by the OSI network layer?
1 routing packets toward the destination 2 encapsulating PDUs from the transport layer
18 Which three factors could influence the differences in throughput compared to bandwith?
1 the amount of traffic that is currently crossing the network 2 the type of traffic that is crossing the network 3 the latency that is created by the number of network devices that the data is crossing
68 A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput?
1 the amount of traffic that is currently crossing the network 2 the type of traffic that is crossing the network 3 the latency that is created by the number of network devices that the data is crossing
42 What are two ways that TCP uses the sequence numbers in a segment?
1 to identify missing segments at the destination 2 to reassemble the segments at the remote location
28 What are two functions of NVRAM?
1 to retain contents when power is removed 2 to store the startup configuration file
32 What are the three ranges of IP addresses that are reserved for internal private use?
10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
83 What is the binary representation of 0xCA?
11010101
38 Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
88 Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
34 What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?
2001:0:0:abcd::1
30 What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?
203.0.113.211
37 A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?
255.255.255.128
89 A network administrator wants to have the same subnet mask for three subnetworks at a small site. The site has the following networks and numbers of devices: Subnetwork A: IP phones - 10 addresses Subnetwork B: PCs - 8 addresses Subnetwork C: Printers - 2 addresses What single subnet mask would be appropriate to use for the three subnetworks?
255.255.255.240
87 How many usable IP addresses are available on the 192.168.1.0/27 network?
30
36 How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
62
12 What is a characteristic of a fault tolerant network?
A network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure
2 Which WAN topology provides high availability and connects some, but not all, remote sites?
A partial mesh topology is describing a network in which devices are organized in a mesh topology, with some network nodes organized in a full mesh, but with others that are only connected to one or two other nodes in the network. A partial mesh does not provide the level of redundancy of a full mesh topology, but is less expensive to implement. Partial mesh topologies are generally used in the peripheral networks that connect to a fully meshed backbone.
1 What is the function of the shell in an OS?
A shell is software that provides an interface for an operating system's users to provide access to the kernel's services.
40 Which scenario describes a function provided by the transport layer?
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
25 If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?
BB:BB:BB:BB:BB:BB A data packet on an Ethernet link is called an Ethernet packet, which transports an Ethernet frame as its payload. Each Ethernet frame starts with an Ethernet header, which contains destination and source MAC addresses as its first two fields. Hence the destination address in the frame when it leaves host A is the MAC address of the Router's gateway.
8 On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
Before you can manage your Cisco switch, you need to configure a management interface. Unlike the routers that allow for management on any configured interface, with switches you are not able to associate IP addresses to the physical ports or interface; rather, you associate the IP address to a virtual interface that is implicitly created with a Virtual LAN (VLAN).
71 What method is used to manage contention-based access on a wireless network?
CSMA/CA
3 What method is used to manage contention-based access on a wireless network?
Carrier sense multiple access with collision avoidance (CSMA/CA): The end device examines the media for the presence of a data signal. If the media is free, the device sends a notification across the media of its intent to use it. Once it receives a clearance to transmit, the device then sends the data. This method is used by 802.11 wireless networking technologies.
48 A wireless host needs to request an IP address. What protocol would be used to process the request?
DHCP
54 A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
DSL
35 Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FE80::/10
12 a What is a fault tolerant network?
Fault Tolerant Network provides high levels of availability and reliability in network connections. Used with redundant network interface hardware, Fault Tolerant allows the user to maintain persistent sessions during a hardware failure or a routing outage or change. Redundant network interface hardware is required to use this feature.
8 a What is the correct way to configure a switchport on VLAN interface?
If you want to manage your switch over the default VLAN, follow these steps (notice end is used in this case to exit Global Configuration mode: Create a new VLAN with the following command: Switch1>enable Switch1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch1#interface VLAN 1 Switch1(config-if)#ip address 192.168.1.241 255.255.255.0 Switch1(config-if)#end
35 a Understanding IPv6 Link Local Address http://www.cisco.com/c/en/us/support/docs/ip/ip-version-6-ipv6/113328-ipv6-lla.html
In the Internet Protocol Version 6 (IPv6), the address block fe80::/10 has been reserved for link-local unicast addressing
11 What are two benefits of using a layered network model?
It assists in protocol design. It prevents technology in one layer from affecting other layers.
62 What function does pressing the Tab key have when entering a command in IOS?
It completes the remainder of a partially typed word in a command.
33 What purpose does NAT64 serve in IPv6?
It converts IPv6 packets into IPv4 packets.
82 What purpose does NAT64 serve in IPv6?
It converts IPv6 packets into IPv4 packets.
10 What is an advantage to using a protocol that is defined by an open standard?
It encourages competition and promotes choices.
21 What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
70 What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
86 What is the purpose of the command ping ::1?
It tests the internal configuration of an IPv6 host.
23 What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame.
76 What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame.
21 a What are the functions of LLC and MAC sub-layers of Data Link Layer ?
LLC is responsible for handling multiple Layer3 protocols (multiplexing/de-multiplexing) and link services like reliability and flow control. MAC is responsible for framing and media access control for broadcast media.
66 What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?
MAC address
16 What is a benefit of using cloud computing in networking?
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
85 Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?
SLAAC
7 The administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?
SW1(config)# enable password letmein SW1(config)# enable secret secretin SW1(config)# line console 0 SW1(config-line)# password lineconin SW1(config-line)# login SW1(config-line)# exit SW1(config)# vty 0 15 SW1(config-line)# password line vtyin SW1(config-line)# login SW1(config-line)# end SW1# Answer: lineconin
58 Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator has already logged into a Telnet session on the switch, which password is needed to access privileged EXEC mode?
SW1(config)# enable password letmein SW1(config)# enable secret secretin SW1(config)# line console 0 SW1(config-line)# password lineconin SW1(config-line)# login SW1(config-line)# exit SW1(config)# vty 0 15 SW1(config-line)# password line vtyin SW1(config-line)# login SW1(config-line)# end SW1# Answer: secretin
65 Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
Segments are sent from the transport layer to the internet layer
63 What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
TCP
9 What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
TCP provides reliable, ordered, and error-checked delivery of a stream of octets between applications running on hosts communicating by an IP network. Transmission Control Protocol accepts data from a data stream, divides it into chunks, and adds a TCP header creating a TCP segment. The TCP segment is then encapsulated into an Internet Protocol (IP) datagram, and exchanged with peers.[
26 a What is ARP ?
The Address Resolution Protocol (ARP) is a telecommunication protocol used for resolution of Internet layer addresses into link layer addresses, a critical function in computer networks. ARP is used for mapping a network address (e.g. an IPv4 address) to a physical address like an Ethernet address (also named a MAC address).
4 Which connection provides a secure CLI session with encryption to a Cisco switch? a console connection an AUX connection a Telnet connection an SSH connection*
The Secure Shell (SSH) protocol is a secure method for remote device access. This protocol provides the structure for a remote login similar to Telnet. SSH provides stronger password authentication than Telnet and uses encryption when transporting session data. The SSH session encrypts all communications between the client and the IOS device. This keeps the user ID, password, and the details of the management session private. As a best practice, always use SSH in place of Telnet whenever possible.
47 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 address is returned to the pool for reuse when the lease expires.
29 What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?
The administrator will be presented with the R1> prompt
5 A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?
The command is being entered from the wrong mode of operation.
61 A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?
The command is being entered from the wrong mode of operation.
57 After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?
The new configuration will be loaded if the switch is restarted.
72 During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
The physical address is added.
39 Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements.
90 Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements.
6 What is the purpose of using Ctrl-Shift-6 key combination?
To interrupt the implemention process of a command.
51 Match the description with the associated IOS mode. (not all options are used.)
USER exec mode PRIVILEGED exec mode GLOBAL config mode
56 On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
VLAN 1
53 A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?
WAN
3 a What is the Media Access Control process?
When using a non-deterministic contention-based method, a network device can attempt to access the medium whenever it has data to send. To prevent complete chaos on the media, these methods use a Carrier Sense Multiple Access (CSMA) process to first detect if the media is carrying a signal. CSMA is usually implemented in conjunction with a method for resolving the media contention. The two commonly used methods are: Carrier sense multiple access with collision detection (CSMA/CD): The end device monitors the media for the presence of a data signal. If a data signal is absent and therefore the media is free, the device transmits the data. If signals are then detected that show another device was transmitting at the same time, all devices stop sending and try again later. Traditional forms of Ethernet use this method. Carrier sense multiple access with collision avoidance (CSMA/CA): The end device examines the media for the presence of a data signal. If the media is free, the device sends a notification across the media of its intent to use it. Once it receives a clearance to transmit, the device then sends the data. This method is used by 802.11 wireless networking technologies.
8 b What is the correct way to configure a switchport on VLAN interface using DHCP?
You do have the option of configuring your switch to use DHCP using the command ip address dhcp. This option can work well if you want to set reservations for the switch's MAC address, but in most organizations, all managed network devices are assigned static addresses for consistency and ensured connectivity. It would be a danger to network-management if you lost the ability to manage your network because a DHCP server went offline for too long. Switch1>enable Switch1#show running-config interface VLAN 1 Building configuration... Current configuration : 82 bytes ! interface Vlan1 ip address 192.168.1.241 255.255.255.0 no ip route-cache end This output clues you in that one important item is missing or, rather, that something is present that should not be. Unlike the reset of the switch ports, the VLAN interfaces are not enabled by default. You can have only one management interface or VLAN enabled at a time, so if you configure a second VLAN interface for management, the first one will be shut down or disabled. It will not be deleted, but it will be disabled. You will have to disable it and enable the other one. Enter the following commands to start using the first VLAN interface again and shut down the second one: Switch1>enable Switch1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch1(config)#interface vlan 1 Switch1(config-if)#no shutdown Switch1(config-if)#end
59 Which connection provides a secure CLI session with encryption to a Cisco switch?
an SSH connection
60 A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?
an SSH connection
13 Implementing QoS what will be the priorities from highest to lowest of the different data types?
audio conference, financial transactions, web page
55 How does quality of service help a network support a wide range of applications and services?
by providing mechanisms to manage congested network traffic
19 What is a characteristic of UTP cabling?
cancellation
26 What addresses are mapped by ARP?
destination MAC address to a destination IPv4 address
75 If a device receives an Ethernet frame of 60 bytes, what will it do?
drop the frame
78 Which switching method has the lowest level of latency?
fast-forward
64 What layer is responsible for routing messages through an internetwork in the TCP/IP model?
internet
84 At a minimum, which address is required on IPv6-enabled interfaces?
link-local
50 When applied to a router, which command would help mitigate brute-force password attacks against the router?
login block-for 60 attempts 5 within 60
49 Which example of malicious code would be classified as a Trojan horse?
malware that was written to look like a video game
14 Which two OSI model layers have the same functionality as two layers of the TCP/IP model?
network transport
45 A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?
nslookup
17 In which layer of the OSI model is an error in a server NIC categorized?
physical layer
67 A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
physical layer
44 What is a key characteristic of the peer-to-peer networking model?
resource sharing without a dedicated server
15 Which name is assigned to the transport layer PDU?
segment
24 Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
store-and-forward switching
41 Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?
the destination port number
69 Which procedure is used to reduce the effect of crosstalk in copper cables?
twisting opposing circuit wire pairs together