HP0-J63 Prüfungsvorbereitung, HP0-J63 braindump

HP0-J63 Prüfungsvorbereitung, HP0-J63 braindump Designing HP Backup Solutions www.it-pruefungen.ch

QUESTION: 1
- (Topic 1)

What should the customer use for non-critical backups?

A. data deduplication
B. snapclones
C. remote replication
D. snapshots

Answer: A

QUESTION: 2
- (Topic 1)

Which value should you include in the financial presentation to the customer?

A. return on investment (ROI)
B. Converged Infrastructure Maturity Model (CI-MM) stage
C. net present value (NPV)
D. total cost ownership (TCO)

Answer: A

QUESTION: 3
- (Topic 1)

What is the customer most likely to experience by using the existing backup strategy?

A. high bandwidth use
B. quick restore times
C. high backup efficiency
D. decreased media costs

Answer: A

IT-Prüfungen HP0-J63 Designing HP Backup Solutions www.it-pruefungen.ch

QUESTION: 4
- (Topic 1)

Which benefits would the customer realize after implementing the new solution, compared to the existing solution? (Select two.)

A. reliable backups
B. reduced cooling costs
C. scheduled archives
D. reduced maintenance
E. reduced power costs

Answer: A,C

HP0-J63 Prüfungsfragen Designing HP Backup Solutions www.it-pruefungen.ch

QUESTION: 5
- (Topic 1)

What should the customer use for critical data?

A. data deduplication
B. remote replication
C. snapclones
D. snapshots

Answer: B

HP HPE0-J74 Prüfungsfragen

HP HPE0-J74 Prüfungsfragen, HP HPE0-J74 Examensfragen Foundations of HPE Storage Solutions exam (ICND2 v3.0) www.it-pruefungen.ch

QUESTION: 1

Which file sharing protocols are available in network-attached storage (NAS)? (Select two.)

A. ZFS
B. SMB
C. iSCSI
D. FCIP
E. NFS

Answer: B,E

QUESTION: 2

A company is planning to implement a backup and archiving solution. They have the following requirements:

Corrupt data files must be restored within seconds Archived data must be available for 15 years.
Archived data must be stored off-site.

Which types of solutions should the company use? (Select two.)

A. Remote replication for backup data
B. Remote replication for archived data
C. Tape-based storage for backup data
D. Tape-based storage for archived data
E. Disk-based storage for backup data
F. Disk-based storage for archived data

Answer: D,E

HP HPE0-J74 Prüfungsvorbereitung Studienmaterial deutsch Foundations of HPE Storage Solutions exam www.it-pruefungen.ch

QUESTION: 3

A customer wants to learn more about the HPE backup solution that you recently proposed. Which resource will help show its value?

A. HPE ActiveAnswers
B. HPE Smart Portal
C. HPE SPOCK
D. HPE Virtual Resource Portal

Answer: D

QUESTION: 4

You are meeting with a small SMB customer to discuss the requirements of a new storage solution The customer tells you that they require a new consolidated platform to provide file storage with built-in deduplication for no more than 20 Microsoft Windows users The customer has limited Budget and IT skills.

With which HPE product should you start the conversation?

A. HPE StoreOnce
B. HPE StoreVirtual
C. HPE StoreServ
D. HPE StoreEasy

Answer: D

IT-Prüfungen HP HPE0-J74 Foundations of HPE Storage Solutions exam www.it-pruefungen.ch

QUESTION: 5

Which operating systems support space reclamation? (Select two.)

A. Microsoft Windows 2003 SP2
B. SLES 9 x
C. Microsoft Windows Server 2012
D. VMware vSphere (ESXi) 5 x
E. Ubuntu 12 x

Answer: C,D

HPE ASE HPE0-J77 IT-Prüfung

HPE ASE HPE0-J77 IT-Prüfung, HPE ASE HPE0-J77 zertifizierung Designing HPE Backup Solutions www.it-pruefungen.ch

QUESTION: 1

A Customer wants to backup their Vmware disks, but does not want to use traditional ISV programs to perform this. Which software solution should you recommend?

A. HPE 3PAR File Persona software
B. HPE StoreVirtual VSA
C. HPE StoreOnce Recovery Manager.
D. HPE 3PAR StoreServ

Answer: C

QUESTION: 2

A customer has two data centers approximately 50 miles (80 km) apart with an HPE 3PAR StoreServ 8000 in each one Both arrays have the Replication Suite license installed.

The current backup solution is based on a tape backup that regularly exceeds their backup window. There are also concerns about securing the physical tapes. Your backup solution must address all of their concerns and keep costs to a minimum

Which HPE product should you incorporate in your design?

A. HPE 3PAR Remote Copy Software
B. HPE 3PAR Cluster Extension
C. HPE StoreOnce Recovery Manager Central
D. HPE StoreOnce Backup System with Catalyst

Answer: D

QUESTION: 3

A backup and restore environment is being designed to use Synthetic backup Which statement describes this operation?

A. Data created or modified since the last full or incremental backup, plus data accessed (touched) during a specified time frame, will be copied
B. Take the last full backup, and append the incremental or differential backups to the full backup set.
C. Database activity is quiesced to ensure that buffers and cached data are flushed to disk before the split is backed up.
D. Copy all files that have been created or modified since the last full or incremental backup.

Answer: B

HPE ASE HPE0-J77 Prüfungsfragen, HPE ASE HPE0-J77 Examensfragen Designing HPE Backup Solutions (ICND2 v3.0) www.it-pruefungen.ch

QUESTION: 4

When creating a new virtual volume for an HPE StoreOnce VSA on an HPE 3PAR StoreServ 8000, how is the RAID level chosen?

A. by selecting the appropriate set size for the W
B. by selecting the appropriate resource pool for the W
C. by selecting the appropriate LD for the W
D. by selecting the appropriate CPG for the W

Answer: D

QUESTION: 5

Which resource provides information for designing data protection solutions, including backup/restore/archiving using HPE StoreOnce (disk). HPE StoreEver (tape), and HPE StoreAll (NAS) storage products?

A. HPE Enterprise Backup Solution Design Guide
B. HPE SAN Design Guide
C. HPE Data Agile BURA Compatibility Matrix
D. HPE QuickSpecs

Answer: C

Prüfungsvorbereitung Studienmaterial HPE ASE HPE0-J77 deutsch Designing HPE Backup Solutions www.it-pruefungen.ch

QUESTION: 6

Which tool can be used to check compliance with best practices for HPE StoreVirtual deployments?

A. HPE OneView
B. HPE Storage Management Utility
C. HPE Centralized Management Console
D. HPE SPOCK

Answer: C

HPE0-J79 Prüfungsfragen, HPE0-J79 Examensfragen

HPE0-J79 Prüfungsfragen, HPE0-J79 Examensfragen Architecting Multi-Site HPE Storage Solutions (ICND2 v3.0) www.it-pruefungen.ch

QUESTION: 1

You need to quickly determine if a software upgrade is available for an HPE 3PAR StoreServ system. Where can you locate this information?

A. HPE 3PAR Firmware Update Notification Utility (FUNU)
B. HPE 3PAR Integrated Management Console (IMC)
C. HPE 3PAR Service Processor Onsite Customer Care (SPOCC)
D. HPE 3PAR StoreServ Management Console (SSMC)

Answer: C

QUESTION: 2

Which network requirements and HPE best practices must be discussed with a customer before implementing an HPE StoreVirtual multi-site solution in a 1 GbE environment?

{Select two)

A. using as few Gb Ethernet links between sites as possible
B. sharing of the WAN bandwidth between servers
C. need for 50 MB/s of bandwidth on each storage node
D. round top latency of less than 2 ms between sites
E. removal of firewalls. NAT devices, and QoS

Answer: A,D

Prüfungsvorbereitung Studienmaterialien HPE0-J79 deutsch Architecting Multi-Site HPE Storage Solutions https://www.it-pruefungen.ch/HPE0-J79.htm

QUESTION: 3

A customer with multiple Oracle databases in their environment reports that users are experiencing slow application response time. You need to create an optimized solution for this customer. You monitored database performance using Oracle AWR server, and storage performance monitoring. The revealed that there is a high I/O wait and the average I/O latency is -30 ms. which is causing slow response times.

Which solution should you propose to address the performance problem?

A. HPE 3PAR storage array with high performance spinning disks with HPE 16 Gb/s StoreFabnc
B. HPE 3PAR all-flash storage array with HPE 16 Gb/s StoreFabnc
C. HPE 3PAR Storage Array with a sufficient number of spinning disks with HPE 16 Gb/s StoreFabric
D. HPE 3PAR hybrid storage Array with spinning disks. Adaptive Flash Cache, and AO with HPE 16 Gb/s StoreFabric

Answer: B

QUESTION: 4

A customer acquired an HPE 3PAR all-flash array to accelerate their databases. They are currently using synchronous replication, but It is causing slow I/O due to limited network bandwidth and latency, both of which cause application slowdown

Which alternative solution should you propose to address the issue”

A. Periodic Asynchronous Remote Copy
B. Asynchronous Streaming Remote Copy
C. Peer Persistence
D. Synchronous Long Distance Remote copy

Answer: B

IT-Prüfungen HPE0-J79 Architecting Multi-Site HPE Storage Solutions www.it-pruefungen.ch

QUESTION: 5

You complete a storage design in the HPE Storage Sizer tool. What is the easiest way to get this design into Sales Builder for Windows (SBW) to create a quote?

A. Export the Bill of Materials to Excel, save the file to a csv. and import to SBW.
B. Use the Solve/Submit button In the Sizer to create the SBW quote automatically
C. Use the supplied Bill of Materials from the Slzer to create the quote manually
D. Use the HPE Storage Sizer SBW export function lo create a file to import into SBW

Answer: D

HPE0-J80 IT-Prüfung, HPE0-J80 zertifizierung

HPE0-J80 IT-Prüfung, HPE0-J80 zertifizierung Delta – Architecting Multi-Site HPE Storage Solutions www.it-pruefungen.ch

Q1
You present an HPE 3PAR StoreServ 8450 all-flash solution to a customer’s C-level management.
Which HPE 3PAIR technologies should you focus on to convince the CIO that your proposed solution is more cost-efficient competitor products? (Select two.)

A. thin deduplication
B. adaptive sparing
C. express writes
D. virtual copy
E. virtual domains

Answer: A,B

Q2
At which level is an HPE 3PAR StoreServ deduplication performed?

A. CPG
B. VV
C. RAID
D. RCG

Answer: C

Q3
You are designing an iSCSI solution for a customer with one data center, who is investing in a second data center that will be ready in the near future. The networking infrastructure of the current data center is generally sufficient for use with an iSCSI storage solution, but it is from a different vendor. The new data center will be equipped with current HPE Networking switches.

A. For maximum performance, Jumbo Frames should be configured on the storage nodes only
B. Jumbo Frames are only required for low latency applications
C. Jumbo Frame sizes are not standardized across all switch vendors
D. Only switch ports must be configured to forward Jumbo Frames

Answer: C

HPE0-J80 Prüfungsfragen, HPE0-J80 Examensfragen Delta – Architecting Multi-Site HPE Storage Solutions (ICND2 v3.0) https://www.it-pruefungen.ch/HPE0-J80.htm

Q4
As part of solution tuning, you want to add online, application-consistent snapshots to a customer’s environment.
Which tasks must be performed? (Select two.)

A. Delete the snapshot
B. Stop the VM
C. Release file locks
D. Flush the buffers
E. Quiesce the file system

Answer: D,E

Q5
Which additional value should you focus on during a solution presentation for an HPE 3PAR StoreServ system using 3.84 TB cMLC SSD drives to appeal to the interests of the company’s CFO?

A. savings of the solution when compared to a similar configuration using 10 k SAS drives
B. savings of the solution when compared to 1.92 TB cMLC SSD
C. performance gain when compared to 1.92 TB cMLC SSD
D. savings of the solution, which approaches the cost of 15 K SAS drives

Answer: A

Prüfungsvorbereitung Studienmaterialien HPE0-J80 deutsch Delta – Architecting Multi-Site HPE Storage Solutions www.it-pruefungen.ch

Q6
A customer has a multi-site environment and plans to consolidate file-and-block-level data. A proof of concept is arranged to familiarize the customer with HPE 3PAR StoreServ File Persona functionality.
Which statement is true when failing over file-level data between the arrays?

A. The Peer Persistence Arbitrator must register the file shares before a failover is initiated.
B. An automated failback is initiated once the primary storage system comes back online.
C. The clients must reconnect to NAS shares once failover is complete.
D. A second cluster IP must be configured as a DNS alias for the file shares running on the HPE 3PAR StoreServ.

Answer: D

IT-Prüfungen HPE0-Y53

IT-Prüfungen HPE0-Y53 Building HPE SDN and FlexNetwork Solutions www.it-pruefungen.ch

QUESTION: 1

An HP Provision switch is controlled by a team of HP VAN SDN Controllers and operates in hybrid OpenFlow mode. The team has added several flow entries. A valid unicast packet arrives on the switch that does not match any flow entries.

How does the switch handle this packet?

A. The switch encapsulates the packet in an OpenFlow packet and sends it to the controller.
B. The switch forwards the packet to the controller over a service insertion tunnel.
C. The switch drops the packet.
D. The switch forwards the packet normally.

Answer: D

QUESTION: 2

A company has an HP VAN SDN Controller Network administrators plan to design their own tools to automate:

-The retrieval of information about OpenFlow devices and end hosts

-Backups and restores of the controller

What should the administrators use in these tools to automate these processes?

A. CLIcommands
B. REST API calls
C. Java script
D. OpenStackAPI calls

Answer: B

HPE0-Y53 Prüfungsfragen Building HPE SDN and FlexNetwork Solutions https://www.it-pruefungen.ch/HPE0-Y53.htm

QUESTION: 3

A network administrator has installed an SDN application from the HP SDN AppStore on the HP VAN SDN Controller. If the application is running and ready to service requests, which status should the administrator see in the controller’s Applications window?

A. RUNNING
B. ACTIVE
C. STARTED
D. UP

Answer: B

QUESTION: 4

The links marked FCoE link shown in the exhibit are links that need to carry FCoE traffic.
What is the proper redundant design for IRF 1?

A. One VSAN, which is bound to FCoE links on both of the physical devices
B. Two VSANs, each of which is bound to the FCoE links on only one of the physical devices
C. Four VSANs, two of which are assigned to FCoE links on one of the physical devices and two of which are bound to links on the other device
D. Two VSANs, each of which is bound to FCoE links on both of the physical devices

Answer: D

Prüfungsvorbereitung Studienmaterial HPE0-Y53 deutsch Building HPE SDN and FlexNetwork Solutions www.it-pruefungen.ch

QUESTION: 5

An SDN application submits a username and password to authenticate to the HP VAN SDN Controller, which is configured for local authentication. If the username and password are valid, what does the controller do?

A. creates a security hash, which the application uses to generate a valid X-Auth-Token
B. sends the application an X-Auth-Token
C. forwards the application an Access-Accept packet
D. requests the last valid token the application used

Answer: B

Prüfungsvorbereitung HPE2-E55, Studienmaterial HPE2-E55

Prüfungsvorbereitung HPE2-E55, Studienmaterial HPE2-E55 PDF Introduction to Selling HPE Products, Solutions and Services www.it-pruefungen.ch

QUESTION 1
Which value proposition is most likely to resonate with small and medium organizations that are seeking a server solution’?

A.HPE BladeSystems can be deployed at remote offices without the need for a server closet.
B.HPE servers are efficient as well as simple to deploy and use.
C.HPE servers offer many technologies for IT staff to tune and optimize.
D.HPE tower servers are designed specifically for the datacenter environment.

Answer: C

QUESTION 2
Which statement is true regarding the Aruba Mobile First platform?

A.It is the only SON-based platform on the market today.
B.it is ranked the number one platform for virtual networking.
C.It is a cloud-based solution for SMBs looking for more agile solutions.
D.It encompasses both wireless and wired solutions.

Answer: A

HPE2-E55 Prüfungen, HPE2-E55 zertifizierungen Introduction to Selling HPE Products, Solutions and Services https://www.it-pruefungen.ch/HPE2-E55.htm

QUESTION 3
A customer is expanding from one site to three and needs a network device that connects all six offices dispersed throughout the country. Which type of device meets this criteria?

A.WAN router.
B.firewall.
C.unmanaged switch.
D.Layer 2 switch.

Answer: B

QUESTION 4
What is a major factor in influencing many small to medium businesses to require wireless network solutions?

A.the growing BYOD movement.
B.the need to increase connection speed.
C.the need to support legacy devices.
D.the need for greater security.

Answer: A

HPE2-E55 Prüfungsfragen, HPE2-E55 Examensfragen Introduction to Selling HPE Products, Solutions and Services (ICND2 v3.0) www.it-pruefungen.ch

QUESTION 5
How do UC applications tend to affect customer networks?

A.They introduce the need for dedicated firewall appliances connected to each edge switch.
B.They increase traffic at the network edge and increase speed requirements.
C.They increase the amount of latency that network devices can tolerate.
D.They make the types of traffic that flow through the network more uniform.

Answer: A

HPE2-E64 IT-Prüfung, HPE2-E64 zertifizierung

HP HPE Sales Certified HPE2-E64 IT-Prüfung, HPE2-E64 zertifizierung Selling HPE SMB Solutions and Services www.it-pruefungen.ch

QUESTION:1

Which benefit does HPE Financial Services (HPEFS) provide to SMB customers to address the challenge of what they should do with their old IT hardware?

A. With HPEFS, customers can easily add recycling services
B. With HPEFS, customers can conserve their cash for other investments
C. With HPEFS, customers preserve their existing bank credit lines
D. With HPEFS, customers simply return their equipment at end of life

Answer: B

QUESTION:2

Which features of the HPE ProliantMicroServer provide benefits to SMB customers? (Select two)

A. instant out-of-box setup
B. convertible to rack mount
C. integrated chassis
D. dual processor for heavy workloads
E. simple embedded management software

Answer: E

HP HPE Sales Certified HPE2-E64 Prüfungsfragen, HPE2-E64 Examensfragen Selling HPE SMB Solutions and Services (ICND2 v3.0) https://www.it-pruefungen.ch/HPE2-E64.htm

QUESTION:3

Which HPE Tower server series is targeted at SMB customers?

A. ProLiant ML 100 series
B. Integrity BL 800c series
C. ProLiant DL 500 series
D. ProLiant SL 200 series

Answer: A

QUESTION:4

Which product is best suited to meet an SMB customer’s backup requirements and to manage data protection at remote locations, and uses Federated Deduplication to significantly reduce the capacity needed to store backup data?

A. HP StoreVirtualVSA
B. HP 3PAR StoreServe VSA
C. HP StoreOnce VSA
D. HP StoreEasy VSA

Answer: C

HP HPE Sales Certified Prüfungsvorbereitung Studienmaterial HPE2-E64 deutsch Selling HPE SMB Solutions and Services www.it-pruefungen.ch

HPE2-E65 Prüfungsfragen, HPE2-E65 Examensfragen

HPE2-E65 Prüfungsfragen, HPE2-E65 Examensfragen Selling HPE Enterprise Solutions (ICND2 v3.0) www.it-pruefungen.ch

Question No : 1
What is one HPE use case tor empowering a data-driven organization?
A. companies that need a single-pane-of-glass management tool to unify their wiredwireless
networks.
B. companies that need to modernize their data warehouses with converged systems.
C. Companies that are looking for ways to strengthen their perimeter security measures.
D. Companies that want to migrate network resources to public clouds
Answer: A

Question No : 2
How does the elastic Infrastructure as a Service (LaaS) in HPE Flexible Capacity for
Channel benefit customers?
A. I allows them to have the infrastructure capacity that they need but pay only for what
they use.
B. Its on-premises-only worked deployment strategy saves them the expense of deploying
workloads off premises.
C. It provides a public cloud solution, allowing them to migrate their services to an easily
accessible cloud.
D. It allows them to meet their anticipated OPEX needs by prepaying for capacity at
discounted prices
Answer: A

HPE2-E65 Prüfungen, HPE2-E65 zertifizierungen Selling HPE Enterprise Solutions www.it-pruefungen.ch

Question No : 3
Which customer needs to Improve their data protection?
A. We cannot analyze our data quickly enough to use it as a strategic advantage
B. Users complain because it takes so long to roll out new applications and they don’t have
access to the applications they need
C. Users at remote offices are complaining because they cannot access the data they need
at the main office.
D. We are using several backup products at our remote offices and don’t know it all our
data is being backed up
Answer: D

Question No : 4
What, primarily, is driving the need for customers to transform to a hybrid IT Infrastructure?
A. The guarantee of protecting their data from cyber-attack, regardless of where it is stored
B. An increase in regulations related to securing data accessed by mobile users
C. The decreasing number of users and applications on their current infrastructure
D. The need for applications to run in traditional. mobile, and cloud environments
Answer: D

Prüfungsvorbereitung Studienmaterial HPE2-E65 deutsch Selling HPE Enterprise Solutions www.it-pruefungen.ch

Question No : 5
A mid-sized customer wants to move to the cloud so that they can pay only for the
infrastructure resources they need. Which HPE Services offering offers elastic
Infrastructure as a Service (laaS) tor customers?
A. Datacenter Care
B. Flexible Capacity
C. Datacenter Infrastructure Automation
D. Software-Defined Infrastructure (SDI)
Answer: B

IT-Prüfungen HPE2-E69

IT-Prüfungen HPE2-E69 Selling HPE Hybrid IT, Intelligent Edge, and Services www.it-pruefungen.ch

Exam ID HPE2-E69
Exam type Web based
Exam duration 1 hour 30 minutes
Exam length 60 questions
Passing score 70%
Delivery languages Russian, Latin American Spanish, Korean, Japanese, German, French, English, Brazilian Portuguese
Related certifications
HPE Sales Certified – Hybrid IT, Intelligent Edge, and Services [2018]
Supporting resources These recommended resources help you prepare for the exam:
01097555: Selling HPE Hybrid IT, Intelligent Edge, and Services, Rev. 17.41

HPE2-E69 Prüfungsfragen Selling HPE Hybrid IT, Intelligent Edge, and Services https://www.it-pruefungen.ch/HPE2-E69.htm

Exam description

This exam tests your ability to identify potential HPE customers and then validate and qualify opportunities to sell HPE Hybrid IT and Intelligent Edge solutions and services. It will test your ability to be conversant in the language of hybrid IT and intelligent edge and the critical role IT must play in making a business successful.
Ideal candidate for this exam

Typical candidates for this exam are HPE channel partners and HPE sales specialists and generalists.
Exam contents

This exam has 60 questions. Here are types of questions to expect:
Multiple choice (multiple responses)
Multiple choice (single response)
Advice to help you take this exam

Complete the training and review all course materials and documents before you take the exam.
Exam items are based on expected knowledge acquired from job experience, an expected level of industry standard knowledge, or other prerequisites (events, supplemental materials, etc.).
Successful completion of the course alone does not ensure you will pass the exam.
Read this HPE Exam Preparation Guide and follow its recommendations.
Visit HPE Press for additional reference materials, study guides, practice tests, and HPE books.

Sections/Objectives
20%
Know the Customer
Discuss with customers the Internet of Things (IoT), app and data, and hybrid IT trends that are driving the customers’ purchasing decisions
Evaluate how customers are changing their IT consumption models to keep up with these trends and achieve their desired business outcomes
Evaluate how customers are changing the way they pay for IT services to achieve their desired business outcomes
Use the Business Value Framework to gather the information needed to have productive business conversations
Determine how the Business Value Framework helps you understand customers’ business requirements
40%
Qualify and Validate the Customer
Map customer characteristics and desired business outcomes to opportunities for selling HPE Intelligent Edge and Hybrid IT solutions
Demonstrate your ability to engage key decision-makers and discuss the types of issues customers face when implementing Intelligent Edge solutions
Demonstrate that you can guide IT business conversations to qualify and validate HPE Intelligent Edge opportunities
Demonstrate your ability to engage key decision-makers and discuss the types of issues customers face when implementing Hybrid IT solutions
Demonstrate that you can guide IT business conversations to qualify and validate HPE Hybrid IT opportunities
40%
Know HPE Competitive Advantages (40%)
Explain how HPE’s strategy is designed to help customers achieve their desired business outcomes
Explain why HPE is uniquely positioned to provide the Intelligent Edge and Hybrid IT solutions your customers need
Determine the advantages HPE Financial Services and HPE Pointnext offer you as an HPE Partner
Determine HPE’s competitive advantages in Intelligent Edge
Identify and overcome barriers and objections by recognizing Hewlett Packard Enterprise’s key differentiators in Intelligent Edge
Determine HPE’s competitive advantages in Hybrid IT
Identify and overcome barriers and objections by recognizing Hewlett Packard Enterprise’s key differentiators in Hybrid IT

Prüfungsvorbereitung Studienmaterial HPE2-E69 Delta – Architecting Multi-Site HPE Storage Solutions www.it-pruefungen.ch