GB0-191-ENU Practice Exam Tests Latest Updated on Sep-2021
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NEW QUESTION 91
Two MSR routers implement dynamic routing learning through OSPF. On one of the routers MSR-1, there are three interface IP addresses 192.168.8.1/24, 192.168.13.254/24 and 192.168.29.128/24, so they must pass a network Command to start OSPF on these three interfaces, which of the following configuration is feasible? (multiple choice)
- A. [MSR-1] ospf [MSR-1-ospf-1] area 0 [MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.32.255
- B. [MSR-1] ospf [MSR-1-ospf-1] area 0 [MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.255.255
- C. [MSR-1] ospf [MSR-1-ospf-1] area 0 [MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.63.255
Answer: B,C
NEW QUESTION 92
The rate of the D channel in ISDN PRI is ______.
- A. 64 Kbps
- B. 54 Kbps
- C. 16 Kbps
- D. 36 Kbps
Answer: C
NEW QUESTION 93
The two MSR routers are connected through the WAN and have dynamically completed remote routing learning through RIPv2. At this time, the routing table has reached a stable state. Then within 45 seconds from this moment, the two routers must have the following messages transmitted between the WAN ?
- A. RIP Request message
- B. RIP Response message
- C. RIP Update message
- D. RIP Hello time message
Answer: B
NEW QUESTION 94
What is wrong about the IP address below is ______. (Multiple choice)
- A. Address translation (NAT) technology is usually used to solve the conversion of class A addresses to class C addresses.
- B. The first octet of a class C IP address starts with 100.
- C. IP address consists of two parts: network number and host number.
- D. The network number of the Class A IP address has 8 digits, and the actual variable number is 7 digits.
Answer: A,B
NEW QUESTION 95
The router S0/0 interface is connected to the network through frame relay, and the following interface information can be seen on this router:
[MSR]display interface Serial 0/0
Serial0/0 current state: UP
Line protocol current state: UP
Internet Address is 3.3.3.1/24 Primary
Link layer protocol is FR IETF
LMI DLCI is 0, LMI type is Q.933a, frame relay DTE
LMI status enquiry sent 91, LMI status received 69
LMI status timeout 22, LMI message discarded 1
Then you know ______. (Multiple choice)
- A. The PVC status of the interface is already UP
- B. This interface has sent 91 status query messages to query the PVC status of the interface
- C. The virtual circuit number used by the interface is DLCI 0
- D. The LMI type of the interface package is Q.933a
Answer: B,D
NEW QUESTION 96
The routing table seen on an MSR router is as follows:
Destination/Mask Proto Pre Cost NextHop Interface
6.6.6.0/24 Static 60 0 100.1.1.1 GE0/0
8.8.8.8/32 Direct 0 0 127.0.0.1 InLoop0
20.1.1.0/24 Static 60 0 100.1.1.1 GE0/0
30.0.0.0/8 RIP 100 1 100.1.1.1 GE0/0
Then the correct analysis of this routing table is ______.
- A. The next hop interface of the route whose destination network segment is 8.8.8.8/32 is InLoop0, indicating that the next hop of the route is a virtual interface similar to Null0, and the route is a black hole route
- B. The IP address of GE0/0 on the router is 100.1.1.1
- C. The routing table is not the complete routing table of the router, and the complete routing table should have at least the direct network segment route of interface GE0/0
- D. The router is running RIPv1 because the mask of the destination network segment 30.0.0.0 is a natural mask
Answer: C
NEW QUESTION 97
Which of the following descriptions about the access ports and links of S series Ethernet switches is correct is ______. (Multiple choice)
- A. The access link can only carry data frames with VLAN ID
- B. When the access port receives a data frame without a VLAN ID, the PVID value of the port is added as the VLAN ID of the data frame
- C. The access link can only carry data frames without VLAN ID
- D. The access port can belong to multiple VLANs at the same time
Answer: B,C
NEW QUESTION 98
Which of the following statements about Ethernet is correct is ________. (Multiple choice)
- A. None of the above statements are correct
- B. Ethernet is a network based on shared media
- C. Ethernet transmission distance is short, the longest transmission distance is 500m
- D. Ethernet adopts CSMA/CD mechanism
Answer: B,D
NEW QUESTION 99
The Ethernet port Ethernet0/0 of router MSR-1 is configured as follows:
interface Ethernet0/0
ip address 192.168.0.1 255.255.255.0
A three-layer switch is connected to this interface, and this three-layer switch is the default gateway of multiple network segments of the customer's office network. For security reasons, the customer now requires configuration on the interface Ethernet0/0 of MSR-1 ACL (does not restrict the application direction) to prohibit all users on the office network from pinging 192.168.0.1, which of the following configurations can be used? (multiple choice)
- A. acl number 3000 rule 0 deny icmp destination 192.168.0.1 0 icmp-type echo
- B. acl number 3000 rule 0 deny icmp destination 192.168.0.1 0 icmp-type echo-reply
- C. acl number 3000 rule 0 deny ip destination 192.168.0.1 0 eq icmp
- D. acl number 3000 rule 0 deny icmp destination 192.168.0.1 0
Answer: A,D
NEW QUESTION 100
UDP belongs to the ______ of the OSI reference model.
- A. Transport layer
- B. Network layer
- C. Presentation layer
- D. Session layer
Answer: A
NEW QUESTION 101
The standard physical medium of 100BASE-TX is ______.
- A. Optical fiber
- B. Thin coaxial cable
- C. Category 3 twisted pair
- D. Thick coaxial cable
- E. Category 5 twisted pair
Answer: E
NEW QUESTION 102
The two MSR30 routers of the customer are interconnected through the WAN interface S0/0, and PPP and RIP protocols are running at the same time. For security considerations, PPP PAP authentication and RIP plaintext authentication must be configured separately. Then the similarity between these two verification methods is ______.
- A. Both use 128bit key length
- B. Both are two handshake verification methods
- C. Usernames and passwords are spread on the network in clear text
- D. All pass clear text keywords on the Internet
Answer: D
NEW QUESTION 103
As shown in the figure, the three MSR routers run OSPF and RIP respectively.
Now that the OSPF neighbor status between RTA and RTB is stable, and the RIPv2 between RTB and RTC is also working normally, then within 40 minutes from this moment, ______. (Multiple choice)
- A. RTB has sent its own LSA summary information to RTA at least once
- B. There must be a packet with a multicast address of 224.0.0.5 in the network
- C. RTB has sent all its routing table information to RTC at least 10 times
- D. There must be a packet with a multicast address of 224.0.0.13 in the network
Answer: A,B
NEW QUESTION 104
The customer's network connection looks like:
HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB
The customer's WAN network only supports synchronization, and S1/0 of MSR-2 needs to negotiate an IP address from the opposite MSR-1 instead of manually configuring a static IP address.
Then the S1/0 interface of the two routers can run ______. (Multiple choice)
- A. PPP+RIP
- B. PPP
- C. HDLC+RIP
- D. HDLC
Answer: A,B
NEW QUESTION 105
The following description of the characteristics of VTY in H3C equipment is correct ______.
- A. Only used to Telnet the device
- B. Each device can support simultaneous access by multiple VTY users
- C. Each VTY user corresponds to a physical interface
- D. No password authentication is not supported
Answer: B
NEW QUESTION 106
To set a subnet mask so that 192.168.0.94 and 192.168.0.116 are in the same network segment, the subnet mask used may be ______.
- A. 255.255.255.240
- B. 255.255.255.224
- C. 255.255.255.192
- D. 255.255.255.248
Answer: C
NEW QUESTION 107
Two empty-configured MSR routers are interconnected back-to-back through their respective GE0/0 interfaces, and their interconnection network segment is 192.168.1.0/30. After the IP addresses are correctly configured, the GE0/0 interfaces of the two routers can communicate with each other. Now the following OSPF configurations are added to the two routers:
ospf 1
area 0.0.0.1
network 192.168.1.0 0.0.0.3
So which of the following statements are correct?
- A. A stable OSPF adjacency relationship can be established between the two routers, but there is no OSPF route in the routing tables of RTA and RTB
- B. No Router ID is configured, and a stable OSPF adjacency relationship cannot be established between the two routers
- C. Area 0 is not configured, and a stable OSPF adjacency relationship cannot be established between the two routers
- D. An OSPF route will appear in the RTA routing table
Answer: A
NEW QUESTION 108
The correct configuration command to enable DHCP service on the router is ______.
- A. [Router] dhcp enable
- B. [Router-dhcp-pool-0] dhcp enable
- C. [Router-dhcp-pool-0] dhcp
- D. [Router] dhcp
Answer: A
NEW QUESTION 109
The network environment is shown in the figure. Do the following NAT configuration on router RTA:
[RTA]acl number 2000
[RTA-acl-basic-2000]rule 0 permit source 100.0.0.0 0.0.0.255
[RTA]nat address-group 1 200.76.28.11 200.76.28.20
[RTA]interface Ethernet0/1
[RTA-Ethernet0/1]nat outbound 2000 address-group 1 no-pat
After configuration, Client_A and Client_B access Server at the same time, then the content of RTA's NAT table may be ______ at this time.
- A. Protocol GlobalAddr Port InsideAddr Port DestAddr Port-200.76.28.11 --- 100.0.0.2 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00: 04:00-200.76.28.12 --- 100.0.0.1 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00:03:59 1 200.76.28.21 1024 100.0.0.1 1024 200.76.29.4 1024 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:00:59 1 200.76.28.11 512 100.0.0.2 512 200.76.29.4 512 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:01:00
- B. Protocol GlobalAddr Port InsideAddr Port DestAddr Port-200.76.28.11 --- 100.0.0.2 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00: 04:00-200.76.28.12 --- 100.0.0.1 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00:03:59 1 200.76.28.12 1024 100.0.0.1 1024 200.76.29.4 1024 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:00:59 1 200.76.28.11 511 100.0.0.2 512 200.76.29.4 512 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:01:00
- C. Protocol GlobalAddr Port InsideAddr Port DestAddr Port-200.76.28.11 --- 100.0.0.2 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00: 04:00-200.76.28.12 --- 100.0.0.1 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00:03:59 1 200.76.28.12 1023 100.0.0.1 1024 200.76.29.4 1024 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:00:59 1 200.76.28.11 511 100.0.0.2 511 200.76.29.4 512 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:01:00
- D. Protocol GlobalAddr Port InsideAddr Port DestAddr Port-200.76.28.11 --- 100.0.0.2 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00: 04:00-200.76.28.12 --- 100.0.0.1 --- --- --- VPN: 0, status: NOPAT, TTL: 00:04:00, Left: 00:03:59 1 200.76.28.12 1024 100.0.0.1 1024 200.76.29.4 1024 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:00:59 1 200.76.28.11 512 100.0.0.2 512 200.76.29.4 512 VPN: 0, status: NOPAT, TTL: 00:01:00, Left: 00:01:00
Answer: D
NEW QUESTION 110
The following statement about the upgrade of H3C network equipment is correct ______. (Multiple choice)
- A. When the device cannot boot to the command line mode and needs to upgrade the operating system software, only the Xmodem method can be used
- B. When using FTP to upgrade, the device can only be used as an FTP client
- C. Use Xmodem to upgrade to the same speed as FTP
- D. In an environment where the complex interaction between the client and the server is not convenient, you can use TFTP to upgrade
Answer: D
NEW QUESTION 111
Which of the following statements about CSMA/CD is correct is ______. (Multiple choice)
- A. CSMA/CD is applied in bus-type Ethernet, mainly to solve the problem of how to detect conflicts and ensure orderly transmission of data when multiple stations send data at the same time.
- B. If two stations start transmitting at the same time, they will hear the signal conflict and pause the frame transmission.
- C. The station can start transmitting its frame only when the channel is free.
- D. When a station connected to the Ethernet wants to transmit a frame, it must wait until the channel is free, that is, the carrier disappears.
Answer: A,B,C,D
NEW QUESTION 112
Which of the following options are features of port-based 802.1x authentication?
- A. All access users under the port need to be independently verified
- B. As long as the first user under the port is successfully authenticated, other access users can use network resources without authentication
- C. When the first user under the port goes offline, other users will also be denied access to the network
- D. When a user goes offline, only that user cannot use the network
Answer: B,C
NEW QUESTION 113
For the understanding of packet switching, the correct one of the following statements is ______. (Multiple choice)
- A. Each packet carries the address identification of the receiver and the sender, and the packet can be forwarded directly without any operation, thereby improving efficiency
- B. Packet switching is a switching method based on cut-through switching
- C. The transmitted information is divided into packets of a certain length and forwarded in units of packets
- D. Packet switching includes frame-based packet switching and cell-based packet switching
Answer: C,D
NEW QUESTION 114
The Serial 0/0 and Serial 0/1 interfaces of the router of the Shenzhen branch of XYZ company are connected to two different ISPs through two WAN lines, and through these two ISPs, you can visit the website of the Beijing head office at 202.102.100.2, in Shenzhen. The following static routes are configured on the router of the branch office:
ip route-static 202.102.100.2 24 Serial 0/0 preference 10
ip route-static 202.102.100.2 24 Serial 0/1 preference 100
So which of the descriptions of these two routes is correct? (multiple choice)
- A. The priority of the two routes is different, the router will write the second route with the higher priority into the routing table
- B. The Cost value of the two routes is the same
- C. The priority of the two routes is different, the router will write the first route with the higher priority into the routing table
- D. The destination address of the two routes is the same, which can be active and standby, and the first route is the master
Answer: B,C,D
NEW QUESTION 115
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