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Following questions and answers are all new published by Cisco Official Exam Center: https://www.lead2pass.com/300-101.html
Drag and Drop Question
Drag and drop the BGP states from the left to the matching definitions on the right.
Drag and Drop Question
Drag and drop the IPv6 NAT characteristic from the left to the matching IPv6 NAT category on the right.
An engineer is asked to monitor the availability of the next-hop IP address of 172.16.201.25 every 3 seconds using an ICMP echo packet via an ICMP echo probe.
Which two commands accomplish this task? (Choose two.)
A. router(config-ip-sla)#icmp-echo 172.16.201.25 source-interface FastEthernet 0/0
B. router(config-ip-sla-echo)#timeout 3
C. router(config-ip-sla)#icmp-jitter 172.16.201.25 interval 100
D. router(config-ip-sla-echo)#frequency 3
E. router(config-ip-sla)#udp-echo 172.16.201.25 source-port 23
F. router(config-ip-sla-echo)#threshold 3
What command can you enter to configure an enable password that uses an encrypted password
from another configuration?
A. enable secret $abc%!e.Cd34$!ao0
B. enable secret 7 Sabc%!e.Cd34$!ao0
C. enable secret 0 Sabc%U*.Cd34$!ao0
D. enable secret 5 $abc%!e.Cd34$!ao0
E. enable secret 15 $abc%ie.Cd34$!ao0
F. enable secret 6 $abc%!e.Cd34$!ao0
A network engineer receives reports about poor voice quality issues at a remote site.
The network engineer does a packet capture and sees out-of-order packets being delivered.
Which option can cause the VOIP quality to suffer?
A. traffic over backup redundant links
B. misconfigured voice vlan
C. speed duplex link issues
D. load balancing over redundant links
In traditional packet forwarding systems, using different paths have varying latencies that cause out of order packets,
eventually resulting in far lower performance for the network application. Also , if some packets are process switched quickly by the routing engine of the router while others are interrupt switched (which takes more time)
then it could result in out of order packets. The other options would cause packet drops or latency, but not out of order packets.
What is the administrative distance for EBGP?
Considering the IPv6 address independence requirements, which process do you avoid when you use NPTv6 for translation?
A. rewriting of higher layer information
B. checksum verification
C. ipv6 duplication and conservation
D. IPSEC AH header modification
The IPv6-to-IPv6 Network Prefix Translation (NPTv6) serves as a useful mechanism for implementing address independence in an IPv6 environment. A major benefit associated with NPTv6 is the fact that it avoids the requirement for an NPTv6 Translator to rewrite the transport layer headers which reduces the load on network devices
What is the optimal location from which to execute a debug command that produces an excessive
amount of information?
A. Vty lines
B. SNMP commands
C. A console port
D. An AUX port
A network engineer is configuring the router for NetFlow data exporting.
What is required in order
for NDE to begin exporting data?
B. Flow mask
D. Interface type
E. Traffic type
F. NetFlow version
NetFlow Multiple Export Destinations–To configure redundant NDE data streams, which improves the probability of receiving complete NetFlow data, you can enter the ip flow-export destination command twice and configure a different destination IP address in each command. Configuring two destinations increases the RP CPU utilization, as you are exporting the data records twice.
Refer to the exhibit. Router 1 cannot ping router 2 via the Frame Relay between them.
Which two statements describe the problems? (Chooses two.)
A. Encapsulation is mismatched.
B. Frame Relay map is configured.
C. DLCI is active.
D. DLCI is inactive or deleted.
E. An access list is needed to allow ping
Frame Relay: Cannot ping Remote Router :
1-Encapsulation mismatch has occurred.
2-DLCI is inactive or has been deleted.
3-DLCI is assigned to the wrong subinterface.
4-An access list was misconfigured.
5-The frame-relay map command is missing.
6-No broadcast keyword is found in frame-relay map statements.
At which layer does Cisco Express Forwarding use adjacency tables to populate addressing
B. Layer 2
C. Layer 1
D. Layer 3
Adjacency table – Nodes in the network are said to be adjacent if they can reach each other with a single hop across a link layer. In addition to the FIB, CEF uses adjacency tables to prepend Layer 2 addressing information. The adjacency table maintains Layer 2 next-hop addresses for all FIB entries http://www.cisco.com/c/en/us/support/docs/routers/12000-series-routers/47321-ciscoef.html
A network engineer wants to ensure an optimal end-to-end delay bandwidth product. The delay is
less than 64 KB. Which TCP feature ensures steady state throughput?
A. Window scaling
B. Network buffers
C. Round-trip timers
D. TCP acknowledgments
options can be carried in a TCP header. Those relevant to TCP performance include Window-scale option : This option is intended to address the issue of the maximum window size in the face of paths that exhibit a high-delay bandwidth product. This option allows the window size advertisement to be right-shifted by the amount specified (in binary arithmetic, a right-shift corresponds to a multiplication by
2). Without this option, the maximum window size that can be advertised is 65,535 bytes (the maximum value obtainable in a 16-bit field). The limit of TCP transfer speed is effectively one window size in transit between the sender and the receiver. For high-speed, long-delay networks, this performance limitation is a significant factor, because it limits the transfer rate to at most 65,535 bytes per round-trip interval, regardless of available network capacity. Use of the window-scale option allows the TCP sender to effectively adapt to high-band-width, high-delay network paths, by allowing more data to be held in flight.
The maximum window size with this option
A network administrator creates a static route that points directly to a multi-access interface, instead of the next-hop IP address. The administrator notices that Cisco Express Forwarding ARP requests are being sent to all destinations. Which issue might this configuration create?
A. Low bandwidth usage
B. High memory usage
C. Cisco Express Forwarding routing loop
D. High bandwidth usage
E. IP route interference
Refer to the exhibit showing complete command output. What type of OSPF router is Router A?
A. internal router
D. edge router
An area is interface specific. A router that has all of its interfaces within the same area is called an internal router (IR). A router that has interfaces in multiple areas is called an area border router (ABR).
How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates?
A. Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface
B. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C. Configure many subinterfaces in the same subnet.
Configure a single subinterface to establish multiple PVC connections to multiple
D. remote router interfaces
If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules, stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.
Which mode of uRPF causes a router interface to accept a packet, if the network to which
the packet’s source IP address belongs is found in the router’s FIB?
A. Strict mode
B. Loose mode
C. Auto mode
D. Desirable mode
A number of common types of DoS attacks take advantage of forged or rapidly changing source IP addresses, allowing attackers to thwart efforts by ISPs to locate or filter these attacks. Unicast RPF was originally created to help mitigate such attacks by providing an automated, scalable mechanism to implement the Internet Engineering Task Force (IETF) Best Common Practices 38/Request for Comments 2827 (BCP 38/RFC 2827) anti-spoofing filtering on the customer-to-ISP network edge. By taking advantage of the information stored in the Forwarding Information Base (FIB) that is created by the , Unicast RPF can determine whether IP packets are spoofed or malformed by CEF switching process
matching the IP source address and ingress interface against the FIB entry that reaches back to this source (a so-called reverse lookup). Packets that are received from one of the best reverse path routes back out of the same interface are forwarded as normal. If there is no reverse path route on the same interface from which the packet was received, it might mean that the source address was modified, and the packet is dropped (by default).
Which of the following are characteristics of TACACS+? (Choose two.)
A. Uses UDP
B. Encrypts an entire packet
C. Offers robust accounting
CHARACTERISTICS O TACACS+
1-TACACS+ encrypts the entire body of the packet
2- TACACS+ uses TCP
3-TACACS+ uses the AAA architecture, which separates AAA
4-TACACS+ offers multiprotocol support.
5-TACACS+ is Cisco proprietary protocol
6-TACACS+ is a heavy-weight protocol consuming more resources 7-TACACS+ uses TCP port 49
8-Mainly used for Device Administration
9-TACACS+ supports 15 privilege levels
Which two options are causes of out-of-order packets? (Choose two.)
A. a routing loop
B. a router in the packet flow path that is intermittently dropping packets
C. high latency
D. packets in a flow traversing multiple paths through the network.
E. some packets in a flow being process-switched and others being interrupt-switched on a transit Router
In traditional packet forwarding systems, using different paths have varying latencies that cause out of order packets, eventually resulting in far lower performance for the network application. Also, if some packets are process switched quickly by the routing engine of the router while others are interrupt switched (which takes more time) then it could result in out of order packets. The other options would cause packet drops or latency, but not out of order packets.
Your company uses Voice over IP (VoIP). The system sends UDP datagrams containing the
voice data between communicating hosts. When areas of the network become busy, some
of the datagrams arrive at their destination out of order. What happens when this occurs?
A. UDP will send an ICMP Information request message to the source host.
B. UDP will pass the information in the datagrams up to the next OSI layer in the order in which they arrive.
C. UDP will drop the datagrams that arrive out of order.
D. UDP will use the sequence numbers in the datagram headers to reassemble the data into the …
Which alerts will be seen on the console when running the command: logging console warnings.?
A. warnings only
B. warnings, notifications, error, debugging, informational
C. warnings, errors, critical, alerts, emergencies
D. notifications, warnings, errors
E. warnings, errors, critical, alerts
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