100-105 Exam
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New Cisco 100-105 Exam Dumps Collection (Question 9 - Question 18)
New Questions 9
When you power up a Cisco router; in what memory is the start-up configuration normally stored in?
A. RAM
B. ROM
C. FLASH
D. NVRAM
Answer: D
New Questions 10
When troubleshooting a LAN interface operating in full duplex mode, which error condition can be immediately ruled out?
A. giants
B. no buffers
C. collisions
D. ignored
E. dribble condition
Answer: C
New Questions 11
What is the requirement of configuring 6to4 tunnelling on two routers?
A. Both ipv6 and ipv4 must be configured
B. Only IPv6
C. Only IPv4
Answer: A
New Questions 12
Which statement is correct about the internetwork shown in the diagram?
A. Switch 2 is the root bridge.
B. Spanning Tree is not running.
C. Host D and Server 1 are in the same network.
D. No collisions can occur in traffic between Host B and Host C.
E. If Fa0/0 is down on Router 1, Host A cannot access Server 1.
F. If Fa0/1 is down on Switch 3, Host C cannot access Server 2.
Answer: E
New Questions 13
SW-C has just been added to the network shown in the graphic
What is the purpose of assigning a default gateway to this switch?
A. allows connectivity to Router B from the switch prompt
B. allows console port connectivity to the switch from Host A
C. allows connectivity to remote network devices from Host B
D. allows the switch to pass traffic between Host A and Host B
Answer: A
New Questions 14
When a router makes a routing decision for a packet that is received from one network and destined to another, which portion of the packet does if replace?
A. Layer 2 frame header and trailer
B. Layer 3 IP address
C. Layer 5 session
D. Layer 4 protocol
Answer: A
Explanation:
Router Switching Function (1.2.1.1)A primary function of a router is to forward packets toward their destination. This is accomplished by using a switching function, which is the process used by a router to accept a packet on one interface and forward it out of another interface. A key responsibility of the switching function is to encapsulate packets in the appropriate data link frame type for the outgoing data link.
NOTE
In this context, the term u201cswitchingu201d literally means moving packets from source to destination and should not be confused with the function of a Layer 2 switch.
After the router has determined the exit interface using the path determination function, the router must encapsulate the packet into the data link frame of the outgoing interface.
What does a router do with a packet received from one network and destined for another network? The router performs the following three major steps:
u2711 Step 1. De-encapsulates the Layer 3 packet by removing the Layer 2 frame
header and trailer.
u2711 Step 2. Examines the destination IP address of the IP packet to find the best path in the routing table.
u2711 Step 3. If the router finds a path to the destination, it encapsulates the Layer 3 packet into a new Layer 2 frame and forwards the frame out the exit interface.
New Questions 15
Which statement describes the effect of the exec-timeout 30 command?
A. The router maintains a user session indefinitely after it is active for 30 seconds.
B. The router disconnects the user session if it is inactive for 30 minutes.
C. The router maintains a user session indefinitely after it is active for 30 minutes.
D. The router disconnects a user session if it is inactive for 30 seconds.
Answer: B
New Questions 16
Which RFC was created to alleviate the depletion of IPv4 public addresses?
A. RFC 4193
B. RFC 1519
C. RFC 1518
D. RFC 1918
Answer: C
Explanation: Explanation
The RFC 1518 is Classless Interdomain Routing (CIDR). CIDR is a mechanism developed
to help alleviate the problem of exhaustion of IP addresses and growth of routing tables. The problems were:
+ With the classful routing system, individual networks were either limited to 254 hosts (/24) or 65,534 hosts (/16). For many network enterprises, 254 hosts were not enough and 65,534 were too large to be used efficiently.
+ Routing information overload. The size and rate of growth of the routing tables in Internet routers is beyond the ability of current software (and people) to effectively manage.
+ Eventual exhaustion of IP network numbers.
To solve these problem, CIDR was selected as the solution in 1992.
In contrast to classful routing, which categorizes addresses into one of three blocks, CIDR allows for blocks of IP addresses to be allocated to Internet service providers. The blocks are then split up and assigned to the provideru2021s customers.
According to the CIDR standard, the first part of an IP address is a prefix, which identifies the network. The prefix is followed by the host identifier so that information packets can be sent to particular computers within the network. A CIDR address includes the standard 32- bit IP address and also the network prefix. For example, a CIDR address of 200.1.45.2/26, the u201c/26u201d indicates the first 26 bits are used to identify the unique network, leaving the remaining bits to identify the specific hosts.
Therefore, instead of assigning the whole block of a class B or C address, now smaller blocks of a class can be assigned. For example, instead of assigning a whole block of 200.1.45.0/24, a smaller block, like 200.1.45.0/27 or 200.1.45.32/27, can be assigned. In fact, CIDR is specified in RFCs 1518,1519 and 1520 so answer u201cRFC 1519u201d is also acceptable.
New Questions 17
WAN data link encapsulation types include which of the following? (Choose two.)
A. T1
B. Frame Relay
C. DSL
D. PPP
E. ISDN
Answer: B,D
New Questions 18
Two hosts are attached to a switch with the default configuration. Which statement about the configuration is true?
A. IP routing must be enabled to allow the two hosts to communicate.
B. The two hosts are in the same broadcast domain.
C. The switch must be configured with a VLAN to allow the two hosts to communicate.
D. Port security prevents the hosts from connecting to the switch.
Answer: B
Explanation: http://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/41860-howto-L3-intervlanrouting.html
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