80AyYiBj

1A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice? (Choose two.)
2lower bandwidth requirements
3reduced cost for equipment and user training
4easier to provide redundant links to ensure higher availability*
5less required equipment to provide the same performance levels
6simpler deployment for additional switch equipment*
7A hierarchical design for switches helps network administrators when planning and deploying a network expansion, performing fault isolation when a problem occurs, and providing resiliency when traffic levels are high. A good hierarchical design has redundancy when it can be afforded so that one switch does not cause all networks to be down.
8
9What is a collapsed core in a network design?
10a combination of the functionality of the access and distribution layers
11a combination of the functionality of the distribution and core layers*
12a combination of the functionality of the access and core layers
13a combination of the functionality of the access, distribution, and core layers
14A collapsed core design is appropriate for a small, single building business. This type of design uses two layers (the collapsed core and distribution layers consolidated into one layer and the access layer). Larger businesses use the traditional three-tier switch design model.
15
16What is a definition of a two-tier LAN network design?
17access and core layers collapsed into one tier, and the distribution layer on a separate tier
18access and distribution layers collapsed into one tier, and the core layer on a separate tier
19distribution and core layers collapsed into one tier, and the access layer on a separate tier*
20access, distribution, and core layers collapsed into one tier, with a separate backbone layer
21Maintaining three separate network tiers is not always required or cost-efficient. All network designs require an access layer, but a two-tier design can collapse the distribution and core layers into one layer to serve the needs of a small location with few users.
22
23What is a basic function of the Cisco Borderless Architecture distribution layer?
24acting as a backbone
25aggregating all the campus blocks
26aggregating Layer 3 routing boundaries*
27providing access to end user devices
28One of the basic functions of the distribution layer of the Cisco Borderless Architecture is to perform routing between different VLANs. Acting as a backbone and aggregating campus blocks are functions of the core layer. Providing access to end user devices is a function of the access layer.
29
30Which two previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure? (Choose two.)
31user data traffic*
32VoIP phone traffic*
33scanners and printers
34mobile cell phone traffic
35electrical system
36A converged network provides a single infrastructure that combines voice, video, and data. Analog phones, user data, and point-to-point video traffic are all contained within the single network infrastructure of a converged network.
37
38A local law firm is redesigning the company network so that all 20 employees can be connected to a LAN and to the Internet. The law firm would prefer a low cost and easy solution for the project. What type of switch should be selected?
39fixed configuration*
40modular configuration
41stackable configuration
42StackPower
43StackWise
44By looking at the graphic in 1.1.2.2 #2 and #3 and comparing those photos to the graphics used in the Cisco switch design model shown in 1.1.1.5 #2, you can see that the smaller rack unit fixed configuration switch is used as an access layer switch. The modular configuration switch would be used at the distribution and core layers.
45
46What are two advantages of modular switches over fixed-configuration switches? (Choose two.)
47lower cost per switch
48increased scalability*
49lower forwarding rates
50need for fewer power outlets*
51availability of multiple ports for bandwidth aggregation
52Fixed-configuration switches, although lower in price, have a designated number of ports and no ability to add ports. They also typically provide fewer high-speed ports. In order to scale switching on a network that consists of fixed-configuration switches, more switches need to be purchased. This increases the number of power outlets that need to be used. Modular switches can be scaled simply by purchasing additional line cards. Bandwidth aggregation is also easier, because the backplane of the chassis can provide the bandwidth that is needed for the switch port line cards.
53
54Which type of address does a switch use to build the MAC address table?
55destination IP address
56source IP address
57destination MAC address
58source MAC address*
59When a switch receives a frame with a source MAC address that is not in the MAC address table, the switch will add that MAC address to the table and map that address to a specific port. Switches do not use IP addressing in the MAC address table.
60
61Which network device can be used to eliminate collisions on an Ethernet network?
62firewall
63hub
64router
65switch*
66A switch provides microsegmentation so that no other device competes for the same Ethernet network bandwidth.
67
68What two criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames? (Choose two.)
69path cost
70egress port
71ingress port*
72destination IP address
73destination MAC address*
74Cisco LAN switches use the MAC address table to make decisions of traffic forwarding. The decisions are based on the ingress port and the destination MAC address of the frame. The ingress port information is important because it carries the VLAN to which the port belongs.
75
76Refer to the exhibit. Consider that the main power has just been restored. PC3 issues a broadcast IPv4 DHCP request. To which port will SW1 forward this request?​
77
78to Fa0/1 only​
79to Fa0/1 and Fa0/2 only
80to Fa0/1, Fa0/2, and Fa0/3 only*
81to Fa0/1, Fa0/2, Fa0/3, and Fa0/4
82to Fa0/1, Fa0/2, and Fa0/4 only​
83What is one function of a Layer 2 switch?
84forwards data based on logical addressing
85duplicates the electrical signal of each frame to every port
86learns the port assigned to a host by examining the destination MAC address
87determines which interface is used to forward a frame based on the destination MAC address*
88A switch builds a MAC address table of MAC addresses and associated port numbers by examining the source MAC address found in inbound frames. To forward a frame onward, the switch examines the destination MAC address, looks in the MAC address for a port number associated with that destination MAC address, and sends it to the specific port. If the destination MAC address is not in the table, the switch forwards the frame out all ports except the inbound port that originated the frame.
89
90Refer to the exhibit. How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty?
91
92SW1 floods the frame on all ports on the switch, excluding the interconnected port to switch SW2 and the port through which the frame entered the switch.
93SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch.*
94SW1 forwards the frame directly to SW2. SW2 floods the frame to all ports connected to SW2, excluding the port through which the frame entered the switch.
95SW1 drops the frame because it does not know the destination MAC address.
96When a switch powers on, the MAC address table is empty. The switch builds the MAC address table by examining the source MAC address of incoming frames. The switch forwards based on the destination MAC address found in the frame header. If a switch has no entries in the MAC address table or if the destination MAC address is not in the switch table, the switch will forward the frame out all ports except the port that brought the frame into the switch.
97
98A small publishing company has a network design such that when a broadcast is sent on the LAN, 200 devices receive the transmitted broadcast. How can the network administrator reduce the number of devices that receive broadcast traffic?
99Add more switches so that fewer devices are on a particular switch.
100Replace the switches with switches that have more ports per switch. This will allow more devices on a particular switch.
101Segment the LAN into smaller LANs and route between them.*
102Replace at least half of the switches with hubs to reduce the size of the broadcast domain.
103By dividing the one big network into two smaller network, the network administrator has created two smaller broadcast domains. When a broadcast is sent on the network now, the broadcast will only be sent to the devices on the same Ethernet LAN. The other LAN will not receive the broadcast.
104
105Refer to the exhibit. How many broadcast domains are displayed?
106
1071
1084
1098*
11016
11155
112A router defines a broadcast boundary, so every link between two routers is a broadcast domain. In the exhibit, 4 links between routers make 4 broadcast domains. Also, each LAN that is connected to a router is a broadcast domain. The 4 LANs in the exhibit result in 4 more broadcast domains, so there are 8 broadcast domains in all.
113
114Which solution would help a college alleviate network congestion due to collisions?
115a firewall that connects to two Internet providers
116a high port density switch*
117a router with two Ethernet ports
118a router with three Ethernet ports
119Switches provide microsegmentation so that one device does not compete for the same Ethernet network bandwidth with another network device, thus practically eliminating collisions. A high port density switch provides very fast connectivity for many devices.
120
121Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
122router*
123Ethernet bridge
124Ethernet hub
125access point
126Layer 1 and 2 devices (LAN switch and Ethernet hub) and access point devices do not filter MAC broadcast frames. Only a Layer 3 device, such as a router, can divide a Layer 2 broadcast domain.
127
128What is the destination address in the header of a broadcast frame?
1290.0.0.0
130255.255.255.255
13111-11-11-11-11-11
132FF-FF-FF-FF-FF-FF*
133In a Layer 2 broadcast frame, the destination MAC address (contained in the frame header) is set to all binary ones, therefore, the format of FF-FF-FF-FF-FF-FF. The binary format of 11 in hexadecimal is 00010001. 255.255.255.255 and 0.0.0.0 are IP addresses.
134
135Which statement describes a result after multiple Cisco LAN switches are interconnected?
136The broadcast domain expands to all switches.*
137One collision domain exists per switch.
138Frame collisions increase on the segments connecting the switches.
139There is one broadcast domain and one collision domain per switch.
140In Cisco LAN switches, the microsegmentation makes it possible for each port to represent a separate segment and thus each switch port represents a separate collision domain. This fact will not change when multiple switches are interconnected. However, LAN switches do not filter broadcast frames. A broadcast frame is flooded to all ports. Interconnected switches form one big broadcast domain.
141
142What does the term “port density” represent for an Ethernet switch?
143the memory space that is allocated to each switch port
144the number of available ports*
145the numbers of hosts that are connected to each switch port
146the speed of each port
147The term port density represents the number of ports available in a switch. A one rack unit access switch can have up to 48 ports. Larger switches may support hundreds of ports.
148
149What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)
150to create fewer collision domains
151to enhance user bandwidth*
152to create more broadcast domains
153to eliminate virtual circuits
154to isolate traffic between segments*
155to isolate ARP request messages from the rest of the network
156A switch has the ability of creating temporary point-to-point connections between the directly-attached transmitting and receiving network devices. The two devices have full-bandwidth full-duplex connectivity during the transmission.
157
158Fill in the blank.
159A converged network is one that uses the same infrastructure to carry voice, data, and video signals.
160Match the borderless switched network guideline description to the principle. (Not all options are used.)
161
162Place the options in the following order:
163allows intelligent traffic load sharing by using all network resources -> flexibility
164facilitates understanding the role of each device at every tier, simplifies deployment, operation, management, and reduces fault domains at every tier -> hierarchical
165allows seamless network expansion and integrated service enablement on an on-demand basis -> modularity
166satisfies user expectations for keeping the network always on -> resiliency
167Match the functions to the corresponding layers. (Not all options are used.)
168
169Place the options in the following order:
170Access layer
171[+] represents the network edge
172[+] provides network access to the user
173Distribution layer
174[#] implements network access policy
175[#] establishes Layer 3 routing boundaries
176Core layer
177[*] provides high-speed backbone connectivity
178[*] functions as an aggregator for all the campus blocks
179Match the forwarding characteristic to its type. (Not all options are used.)
180
181Place the options in the following order:
182cut-throught:
183+appropriate for high perfomance computing applications
184+forwarding process can be begin after receiving the destination address
185+may forward invalid frames
186store-and-forward:
187#error checking before forwarding
188#forwarding process only begins after receiving the entire frame
189#only forwards valid frames